JOST A MON

The idle ramblings of a Jack of some trades, Master of none

I've been somewhat obsessed with Russian art for a bit.  A few months ago, the obsession combined with avarice when I heard about the publication of the Encyclopedia of the Russian Avant-Garde, a three-volume masterpiece edited by D. Sarabyanov and V. Rakitin, featuring contributions from 170 specialists. It contains biographies of artists great and small, movements major and minor, groups, collectives and manifestos, and illustrations of fine calibre for every aspect of this great period of art. The editors had laboured over it for more than 10 years, and the final product looked like a beaut - superb production values and, dash it, a limited print run. The few copies that remained after the bulk had been sent to museums and archives were priced at tens of thousands of rubles. 

Eru Ilúvatar,
I've been good this year. Can I please have the Encyclopedia of the Russian Avant-Garde? I promise to be good next year as well.
Fëanor

I found one online store selling the book. The price, as I said, was eye-watering, even when converting to pounds sterling. Recently the ruble collapsed to less than half its original value and I took a look at the website again. The book was no longer available! Drat and damn! Those pesky Russians, obviously trying to safeguard their money, had gone on a buying spree. They bought large-screen TVs, property in London, and this encyclopedia. Morgoth alone knows when copies will emerge for sale again.

There was talk about electronic versions and French translations, but where are they, I ask. Where?

Ilúvatar, what are you going to do about this?

Feb 25, 2011

Medieval Credit

In Hawala and Honour, I discussed various ways that medieval businessmen and private individuals and even the state (or royalty) obtained finance, and how they enforced contracts. In an about-turn to today's perceived view that the Protestant ethic is more conducive to financial innovation, in the medieval period, it was the Roman Church that enforced contracts in its jurisdictions. Bankers such as the Medici had a horror of lending money to the Germans because Catholic law didn't apply in German courts, and they often couldn't recover money from German debtors.

While the principles of money as a store of value and medium of transaction had long been established, coin or bullion was not always easily portable. Much of historical trade was on the basis of silver or gold in exchange for goods, of course, although this was never really secure. Long-distance trade didn't explode, therefore, until the development of the bill of exchange in the thirteenth century.

Here's how it worked [1]. An English exporter would send his goods to his Florentine counterparty. The importer would receive the goods and pay the agreed amount of florins to his bank, who would furnish him with a bill of exchange. He would then send the bill of exchange to his payee in England, while - in parallel, the bank would send a notification to its agent in London. When the exporter received the bill, he would approach the agent, hand over the bill and obtain his monies in sterling.

The exchange rates would, I surmise, have been as agreed between the exporter and importer. The importer would know how much his bank would charge to convert florins to sterling at some future delivery date; this rate would determine the amount of florins he would hand over to the bank upon receipt of the English goods. There were problems that could arise from the transit time between the shipment's departure and arrival, and the departure of the notification to the banker's agent, and his receipt of the bill of exchange from the English exporter. The determination of future rates was upon the assessment of the banker on the risks of the journey and the distance to be covered; the future payment date was often standardised, at usance: between Florence and London, this was set at 3 months.

This schematic is after Spufford [2].

International Trade and Credit Flow
The system of double-entry book-keeping that was invented at about the same time helped keep track of the various credits and debits in all these transactions. The exporter would write in his book's debit column an entry for goods sold. The importer would enter a credit to the payee upon receipt of the goods, and a debit to the banker for the delivered florins, thereby immediately balancing his book. The banker would enter a credit of florins from the importer. When the English exporter produced the bill of exchange at the banker's agent's, the agent would enter a debit for the bill to the banker, and the exporter himself would enter a credit for the payment received. The exporter's books would be balanced at that point. The bank and the agent would settle their books at their own convenience.

What did a typical bill of exchange look like? A treasure-trove of such information was revealed when, in 2000, the Borromeo-Arese family allowed academics from Queen Mary College to study two full ledgers from the medieval Borromei Bank of Bruges and London (estabished in 1434). Here is a description from the Queen Mary website [3]:
The acceptance or payment of a bill was usually set out in a complex sentence that indicated who had delivered the bill, who had taken it up, who had agreed to pay it and who was to be paid.[2] In the following example the Bardi of Bruges were takers of a bill of exchange for 800 scudi or flemish écus at an exchange rate of 7s 5d of the £ Barcelona per écu. The Deliverer sent the bill to the Payee in Barcelona; the Taker would write to the Payor in Barcelona with instructions to pay it to Payee at usance, that is 65 days from the writing of the letter. The Italian entry reads:

Ubertino de’ Bardi e compagni deon havere … sono per una lettera ne fecie a Barzalona di scudi 800 a s7 d5 per scudo per dì 65 fatta insino a dì 5 di questo in Antonio de Pazi e Francesco Tosinghi i quali rimettemo a Bernardo da Uzano e compagni per loro conto a loro, fo 168.

By the 15th century, bills of exchange were the commonest form of international monetisation in Europe. With the increasingly lucrative trade between the Ottomans and the Europeans, one would have expected this innovation to take hold in the East as well. This didn't always progress happily. There is an example of a letter of exchange drawn in Pera (Turkey) to be settled in Chios (Crete) that was rejected by the payer at Chios. Still, agents in Constantinople of European banks were quite happy to accept these letters. In 1437, a Cretan named Dimitri Argiti travelled to Gelibolu taking with him a letter for 1177 aspers. [4]

By 1460, credit in the form of letters of exchange was important even in Eastern commercial centres such as Bursa.

Check out:

1. Norman Biggs, 'Mathematics of Currency and Exchange: Arithmetic at the end of the 13th century', Gresham College, April 2008.

2. Peter Spufford, Handbook of the Medieval Exchange.

3. The Borromei Bank Research Project, Queen Mary, University of London.

4. Kate Fleet, European and Islamic Trade in the early Ottoman state.

Nov 25, 2010

George Magnus at Lunch

UBS organised a lunchtime session yesterday with George Magnus, their Senior Economic Advisor, and author of the recent Uprising: Will Emerging Markets Shape or Shake the World Economy. While Mr Magnus spoke, several investment managers nibbled delicately on Poached and smoked Loch Duart salmon rillete with buckler sorrel, Classic lamb navarin with autumn root vegetables and ratte potato puree, finishing off with White and dark chocolate mousse with chocolate sable, and some coffee. Magnus himself had to pass on his starter, barely got into his main course, and smacked his lips only once upon the dessert.

The question he sought to answer in his book was its subtitle: ‘Will Emerging Markets shake or shape the world economy?’

He broke up the prognosis into 3 indicators:

1. Demographic change: while many Emerging Market (EM) countries are aging rapidly, others (e.g. India, Indonesia, Turkey) are having a boost in working age populations that will continue to last over the next 10-20 years, and can provide a big increase in growth and productivity if they are all gainfully employed. If they aren’t employed, of course, there can be serious social problems.

2. Technological catch-up in EM: some EM countries attain excellence in some aspects of technology (e.g. green tech in China, biotech in India, …). But there isn’t that depth of cultural and social infrastructure that enables them to consistently beat the developed world at all aspects of technical prowess. The catch-up means – for the most part – that the revenues will likely continue to flow into the developed market countries that produce most of the technical knowhow.

3. Climate change: while the worst affected countries by climate change are all EM, they will possibly spend large amounts to develop infrastructure to resist the worst of its effects.

The EM world has developed its manufacturing capacity to supply a world growth rate of about 6% p.a, which was the sort of growth seen in the two decades before the credit crunch. If world growth slows, then this overcapacity can lead to economic problems in the EM as well. And if developed world begins to save more, EM needs to spend more, otherwise we will end up with de-globalisation, protectionism, … As Magnus points out, despite noises at G20 meetings supporting globalisation and open markets, there has been a trend in protectionist measures over past two/three years already impacting about 2% of world trade.

The Chinese seem to understand that they have a part to play in the rebalancing of the world economy, but whether they will actually do anything other than mouth platitudes at 5-year plan announcements remains to be seen.

I got a copy of his book (signed, but not addressed to me) and stepped back into the cold streets of the City. At that same time, another demographic challenge was revealing itself. Students had taken to the streets of London too - only they were protesting increases in their tuition fees as part of UK's fiscal austerity. It's a sad truth: the babyboomers have enjoyed a long, long boom, and will continue to reap its dividends long into retirement, while their children and grandchildren face years of unemployment and relative indigence.

The generational struggle can only get worse.

Oct 26, 2010

False Currency

Saw an interesting headline in the Zambian Post recently. 'Rupiah is a lair, Sata tells Mpulungu residents', it said. Got me thinking. Are Zambians investing in Indonesia? Does Mr Sata think that the Indonesians are up to no good? Will they, heavens above, devalue their currency? And why does he say 'lair'? Does he mean that that's where the unwary end up?

That's the problem with working in the foreign exchange markets. Everything one sees is coloured through an exchange rate prism. Fortunately, a quick perusal of the newspaper content disabused me of any foreign exchange related notions. 'Lair' was a typo. That should have read 'Rupiah is a liar.' And, of course, Rupiah is the first name of Mr Sata's opponent at the Mpulungu parliamentary by-election.

Mr Sata added, "I am younger to Rupiah Banda by only six months but I am honest."

Sep 28, 2010

Exporting Powerhouse

The Huguenot traveller and scribe Jean Chardin can be considered an early economic historian. In his Travels in Persia, 1673-77, he describes the massive sink for bullion that India was, and its enormous trade advantages with respect to its neighbours. He also astutely reasons why Hindu merchants were able to outbid and outprice their Muslim and Christian competitors. 

By the 1600s, the Mughal Empire was established as possibly the wealthiest state in the world, easily comparable even to the Mings in China. Unlike the Chinese who were a massive net importer of products from around the planet, the Mughals were fortunate in reigning over an absolutely astonishing trade surplus. Gold and silver from the Americas and Europe simply poured into India. Being an agricultural and industrial powerhouse, and to all intents and purposes self-sufficient in food, India was able to export away most of its surpluses. And, with a large population base that was able to work for cheap (and with inflation being next to zero for well-nigh on a couple of centuries), India was able to produce goods so competitively priced that even factoring in the risks of international trade, they still were cheaper than local products in Iran and the Ottoman domains.

There was a large Indian diaspora in Iran in those years, estimated at close to 10,000 permanent residents. All over the trading territory on either side of India, from South-east Asia to the Mediterranean, Hindus of the Marwari subcaste, and their Jain counterparts, maintained interconnected affiliations with their kin. There were banias, in other words, plying their trade, as they have continued to do with much skill all the way to the present. They had become wealthy under the Mughals by offering them credit, and traded and lent money in Bandar Abbas in the Persian Gulf. But the 10,000 traders in Isfahan that Chardin referred to were Punjabi Khatris.

Many of these people had begun overland treks in search of trade even before the advent of the Mughals. Babur himself estimated that 20,000 of them came to Kabul every year from India. Many continued further west, establishing family firms in Persia in the manner of the Italians (e.g. the Medicis). Iran at the time was seriously cash-starved, being a net importer of nearly every possible good, and the Khatris were able to lend large amounts of money in that country to keep its markets functioning.

They were reputed to be very aggressive wheelers and dealers. An Englishman, Edward Pettus, who was posted to Isfahan by the East India Company said this of them (using the term 'bania' to mean all non-Muslim Indians):
The bannians, the Cheif Marchantes who vende Linene of India, of all sorts and prices, which this Countrye cannot bee without, except the people should goe naked ... they vende most of the linene they bring to Spahan after a most base peddlinge, and unmarchante like manner, carrying it up and down on their shoulders in the Bazar.
Although Chardin was a Huguenot who had taken refuge in England from persecution in France, he was not above some bigotry himself. His description of the Khatris evoked similar distaste for the Jews in his homeland, referring to them as nefarious and usurious moneylenders who drained Iran of its wealth by repatriating bullion back to India.

Despite this assessment, he was in general quite nuanced in his perception of Indian merchants. Clearly, Hindus and Jains had no religious proscriptions against charging interest. Chardin believed this gave them a leg up in new markets, and a serious advantage in established ones. But simultaneously, he also pointed out that Muslims had developed a subtlety in their financial methods as well, concealing interest payments when it suited them. On the other hand, the prohibition of usury meant that money didn't circulate quite as easily in Iran or Turkey amongst the locals, who preferred to invest in infrastructure ancillary to trade (such as caravanserais and bazaars). The Khatris by dint of their willingness to lend created a multiplier effect that redounded to their own benefit far more than the Muslims.

Check out: Stephen F. Dale, The Muslim Empires of the Ottomans, Safavids, and Mughals, Cambridge University Press, 2010.

Jul 24, 2010

Examination

What a lovely summer we're having. One should be out and about, having the occasional Pimm's to relax, and possibly taking in the gorgeousness of the English countryside while one's at it. Instead, one is sitting at home surrounded by thick books on regulation, accountancy, large-and-small-economics, and basic statistics.

After around 5.75 years in the financial industry, I have finally decided to take the test that is the basis for certification by the Financial Services Authority as an Approved Person. Whilst I was a lowly Quantitative Person, I had no real need for this qualification: I wasn't directly managing anyone's money. Pension funds, in other words, woke daily with tra-la-las on their ledgers, and central bankers congratulated each other on having, in me, a swot who could do them no harm.

Now, though, I'm expected to shoulder the burden of investment responsibility. I am no longer only a mathematical number-cruncher. I am to be an asset manager. I need to be Approved.

And so, in the midst of the finest summer London's had in years, I am behind closed doors, mumbling annuity formulae and pondering the differences between preference and ordinary shares. Before the middle of August, I will have acronyms coming out of my ears, and I'll be able to tell you the difference between a Lorenz curve and a pie-chart.

Woe, that is to say, is me.

Apr 20, 2010

Usurer? Sinner!

While I'm not clued up on why there is a prohibition against usury (the taking of interest) in the Abrahamic faiths, I am fairly certain that there have always been workarounds, obfuscations, economy with the truth, and considerable ingenuity on the part of lenders to extract their pound of flesh. As it was considered a mortal sin to take any interest on a loan, lenders no doubt twisted themselves into knots to avoid the damnation of their eternal souls. Borrowers, of course, could affect a superior tone.

The usual answers to why a lender would charge interest are: the human desire for immediate gratification implies that a rupee today is worth more than a rupee tomorrow; inflation depreciates the value of a rupee over time; it is likely that repayments in the distant future are risky owing to unforeseen circumstances such as the death or the flight of the borrower, and this risk ought to be priced into the loan.

In the medieval English period, inflation appears not to have been a serious concern. Default risk, on the other hand, has always been a matter of worry for lenders. Loaning money to kings would have appeared particularly fraught - not only could the sovereign refuse to pay, he might also confiscate the lenders' assets and put them to death, just because he could.

How was the poor lender to protect himself, and yet avoid consigning his soul to the Devil? Specific examples of financial cleverness can be found in economic history1.

One way around usury was for the borrower to sign a document stating that he had borrowed a larger amount than he actually received from the lender. The borrower might agree, for instance, that his loan was £100 to be paid off in a year, whereas he obtained £66 13s 4d in hand. (This worked out to 50% annual interest. No wonder the lender was not held in particularly high esteem.)

Another way around would be for the borrower to bestow 'gifts' upon the lender at some future date, in gratitude for the lender's assistance. As long as there was no intentional connection between the loan and the gift, this was eminently acceptable to religious figures in the Middle Ages. King Edward III of England granted gifts of £11,000 to the Italian bankers, Bardi, for their loan of £42,000.

Yet another way was for the lender to issue a series of claims of damages - penalties for not repaying the loan - after setting an infeasibly early date for repayment of the original loan. Italian lenders in the 13th century used to impose a penalty every two months of one mark for every ten marks lent, equivalent to an annual interest rate of 60%.

Naturally such obfuscations also needed to be mirrored in the official accounts:
A large-scale example of the massaging of figures to produce a predetermined outcome can be found in the audits of the accounts of the Ricciardi with Edward I in 1276 and 1279. In both cases, the king was left owing a suspiciously round sum to the Ricciardi, namely £13,333 13s 4d (or exactly 20,000m) in 1276 and £23,000 in 1279. It seems likely that the Ricciardi and the king had agreed on a reasonable figure to cover the Ricciardi’s costs and leave them in profit. In order to justify this within the Exchequer system of accounts, it was necessary for the payments made by the Ricciardi to exceed their receipts by exactly the figures agreed. In the case of 1279, we can catch the Exchequer clerks in the act of ‘cooking the books’. The 1279 account follows the standard format, first listing all the Ricciardi credits and then all the Ricciardi discharges. The total received by the Ricciardi was £178,478 19½d, while their expenditure and allowances listed in the account come to £189,797 19s 6d. Thus we can calculate an actual Ricciardi surplus of £11,319 17s 10½d. This meant that, in order to reach the ‘correct’ figure of £23,000, the Exchequer clerks had to either reduce the Ricciardi receipts or inflate their expenses. They seem to have chosen the latter course but, fortunately for us, the clerk responsible for the account muddled his sums. When calculating the total advanced by the Ricciardi to the king, he deducted the agreed £23,000 from the total Ricciardi receipts, instead of adding it, thus making a total of £155,478 19 ½d for expenditure by the Ricciardi. As a result, the Ricciardi appeared to owe £23,000 to the king. This mistake was corrected and the ‘right’ figure of £201,478 19½d supplied below. This is simply the most egregious example of a practice that must have been widespread.1


References

1. A. R. Bell, C. Brooks, T. Moore, 2008. Interest in medieval accounts: Examples from England, 1272-1340. ICMA Centre Discussion Papers in Finance, DP2008-07, Reading.

2. Credit Finance in the Middle Ages.

I can be stunned and stirred at the same time. Yes, I can. This is something that has been simmering under my hat for a while now, but a recent spate of data releases has finally caused my baffled fury to boil over.

Of what speak I? Why, Albion's perfidious government. In what has to be the grandest gerrymandering achievement ever, Labour has managed to create a vast class of people so utterly beholden to them that it is unimaginable for these folks to vote for anyone else. And who are these sheep? Why, public servants in all their disguises.

It is absolutely breath-taking. During the 10-odd years of Britain's economic boom, a period that our man Gordon Brown attributed entirely to his own skill (further embellished by his '
no more boom and bust' speeches), which part of the workforce added more jobs? You guessed it - the public sector. Between 1998 and 2007, of the 1.2 million jobs added in urban UK, two-thirds (two-thirds!) were in some bureaucracy or the other. In some parts of the UK, state employees are 70% of the workforce. We might as well be living in the USSR.

And what sorts of jobs are these? Not all necessary ones, of course, like teachers or police or nurses. Oh no. There were new metrics established that determined the efficacy of teachers and nurses and policemen. Who would monitor these metrics? The newly employed 'managers', of course. And watchers-to-watch-watchers in some surreal exponential series of artificial jobs.

To attract suitable talent from the private sector, massive salaries were offered to such worthies as heads of the various municipal authorities. Many of them were
paid more than the Prime Minister, even.

Meanwhile, to fund all these pen-pushers and layabouts and non-jobs, the Treasury under Labour issued billions of sterling in debt, so that when they really should have been paying down the deficit, they instead caused it to swell to gargantuan proportions. When the crash occurred in 2007-2008, obviously the fiscal situation then took a further plunge into the abyss.

Of course, the joke, dismal as it is, doesn't end there. It turns out that these leeches on the body politic actually - in the median -
earn more (£539 per week) than the private sector employee (£465).

In what universe is this sustainable? The private sector pays for most of this largesse in the form of tax. The state has continued to grow and grow. This makes eminent sense during a recession. But it made no sense at all during the years of growth.

Meanwhile, there are still more benefits to a public sector job. No matter what you earn, you are guaranteed a nice final-salary pension when you retire. (
Civil servants who joined after 2007 don't have the perk, it appears.) Why NHS consultants many of whom earn more than £100,000 need a guaranteed pension is anybody's guess. Especially when final-salary pensions in the private sector are mere whispers, tales told of legendary times. The argument for defined benefit pensions for public servants used to be that they earned so much less than the private sector jobbie that this was fair recompense in their old age. We have seen that this is a staggering lie.

I can't blame the public servant, of course. If I got a job that assured me of a nice salary and a rollicking pension, security, in fact, for the rest of my life, I might jump at it. Particularly if I lived in some dismal part of the Midlands, say, where, for entertainment, all I could do was throw stones at passing trains. I lay the blame entirely on Labour, even as I doff my hat to their chutzpah. They have fucked the United Kingdom well and proper, and left its people so in thrall to them that I cannot see them ever bowing out of power.

Someone please tell me I'm wrong, and there's a way out of this hellish morass.

Jan 22, 2010

Chaps

Met a chap the other day. He spoke to me about trading models. He said that it wasn't difficult to develop a strategy that would make small incremental gains consistently over a period of time. Then, he said, it would collapse spectacularly, and you'd get, erm, slaughtered. Look at carry, he said. It did very well for years, and then the markets spooked, he said, and everyone got, erm, murdered. And you know what, he said, because the markets expect to collapse one day, buying protection against that collapse is always more expensive than you think. If you want to make money, he said, you should sell out-of-the-money puts, and you can sit on your profits till you get, erm, buried. By now his face was a spectacle, and he looked like he was running out of synonyms for crash and burn. But no! He went on, getting increasingly animated. ... And that's a strategy that works nicely until you get, erm, cremated, he said. He was quite happy with cremated for he used it a couple of times more. Then he floundered. He ground to a stop.

Met a chap the other day. He was getting married and he had invited his ex-girlfriend to the wedding. His name was Rob. Aren't you upset? I asked the bride. No, she said, and urged Rob to tell the story of his ex-girlfriend. She, it seems, had gotten married to some other fellow after she broke up with Rob. Strangely enough, said Rob, her husband's name is also Rob. We stood around and ruminated on this coincidence. I met Rob, said Rob. Or, said Rob, I should say Rob 2.0. Yes, chuckled his bride. Rob 2.0 is not balding. And he's younger. Definitely an improvement on Rob.

Met a chap the other day. He had a lisp. He spoke to me about King Henry the Eighth, who, he said, took a thucthethion of mateth. And inthithted that the monkth were a lazy bunch of thkunkth.

Well, what do you know? According to a study done by a couple of European academics, finance professionals are not as good as undergraduate students at forecasting exchange rates over the ensuing period. While other professionals are generally better than Joe Public at predicting features of their domains of expertise (e.g. meteorologists generally get the weather right more often than the hoi polloi), it turns out that financiers have biases that mess up their abilities to forecast foreign exchange levels accurately.

Here's the abstract of the paper:
Professional forecasters in foreign exchange markets are not able to beat naive forecasts. In order to find reasons for this phenomenon we compare the empirical forecasts of experts with the experimentally generated forecasts of novices of the EUR/USD exchange rate in three different forecast horizons. Although the subjects are only provided with the realizations of the exchange rate and are not supported by any statistical procedures they outperform experts in accuracy. Professionals consistently expect a reversal of foregoing exchange rate changes whereas novices extrapolate trends. The judgemental forecasts appear to be unbiased and professionals appear to be biased. We demonstrate that professionals are influenced by the fundamental value - an irrelevant anchor in speculative exchange markets. The poor performance of the experts is not a common failure of human decision-making in market environments but caused by misleading information.
This should be dispiriting to those of us who work in the business. Why is it that a bunch of students who have no clue about the way foreign exchange markets behave outperform a bunch of highly-paid City types?

The reason appears to be two-fold. City economists have a cognitive bias - they 'know' that currencies tend to revert to a level given by what is called purchasing power parity. They, therefore, tend to predict a fall in a given exchange rate if they think it is above that parity level, or a rise if it is below. The students, on the other hand, merely project the visual trend they observe given the recent performance of the currency. Because there are brief periods of trending behaviour among currencies (although overall they tend to follow a random walk), the students get their predictions right more often than the professionals.

The other reason is that City professionals set much store by all the masses of data they encounter on their Bloomberg or Reuters terminals, and subconsciously assume that this gives them some sort of inside view into the markets. Unfortunately, over the periods they are asked to forecast - one to six months, say - the most recent exciting news (which usually has the greatest effect on their thinking) usually has little bearing.

The study can be criticised in a number of ways, though. Whereas the researchers recruited their pool of students, they didn't do so with the professionals. Instead, they used a consensus forecast as provided by some third party. The consensus forecast, in our experience, has little practical relevance. What is generally more informative is the spread in the forecast - how far apart are the individual forecasts? - or how many economists predict a level higher than the median as opposed to how many predict a level lower than the median. Also, it is true that these economists are rarely brought to task with respect to the accuracy of their forecasts. After all, no money is invested based on them. The ones who are tasked with making money are portfolio managers and the like. They are not really interested in forecasts of exchange rate levels - what is more important to them is the accuracy of the direction in which the exchange rate is likely to move.

A colleague recently conducted a brief study into the long-term dynamics of currency rates. He found that at any given time, a third of the exchange rates under consideration tend to be utterly random. He joked that we might as well stay at home a third of the time. But of course the problem is that we don't know which of these currencies will stop behaving randomly in the next period (a week or a month or a quarter). If we did, we could invest in those rates and listen to the 'kaching, kaching' noises as the profits poured in.

It is this constantly changing behaviour of currencies that makes them so difficult to model. All we can strive to do is to capture the brief periods of inefficiency and hope they last long enough to be monetised. It's all good fun.

- J. Leitner, R. Schmidt, "A systematic comparison of professional exchange rate forecasts with the judgmental forecasts of novices."

Mar 7, 2009

Winner!

Every month, on the first Friday, the US Bureau of Labour Statistics announces the Non-Farm Payrolls number. This is widely seen as an important macroeconomic datum for the US economy, and large surprises in it causes swings in nearly every financial market on the planet. It is considered to be difficult to forecast accurately, despite it having seasonal variations, and so is fair game in nearly every financial institution for a sweepstakes.

We are no different at my workplace. The sweepstakes is simple: whoever chooses a number that's closest to the actual as reported by the Bureau wins the pot. When I began participating a couple of years ago, the entry fee was £1 with the winner collecting it all. Last month, the boss, claiming that in these difficult times of credit crunch we should strive to make someone very happy, urged us to raise the stakes to £5. Amazingly, people agreed. He then proceeded to win handily. It turns out he ran some statistical regression or the other, and his guess came surprisingly close to the actual number.

Now, over the past several months, payroll numbers have been plummeting in the US. It's not too surprising, then, that fitting a trend line should be a reasonably accurate forecast. Previously, I had generally chosen randomly - as far away from the average opinion as possible, so that if the result were an outlier, that is, far from the average, I'd claim the pot. Never worked, dash it. This month, I briefly considered getting fancy with my forecast. I tried this model (ARIMA) and that (linear regression). Both of them gave me numbers that were not too different from the consensus of 79 economists polled by Reuters. What was the point of using these models, then? The last time I had chosen the Reuters consensus, I had been so far away from the announced number that it was embarrassing even to admit I had participated in the sweepstakes. But perhaps now my luck was turning? After all, only two days earlier, I had won £10 on the National Lottery. (Woo-hoo. 10x returns! Take that, financial practitioners!) So I chose a number (-675,000) close but not too close to the consensus (-648,000). The rest of the punters were all over the place; some predicting a drop in employment of a million even.

At this point, I can modestly admit that I won. About bloody time, too, I say. The number came in at -651,000. Kudos and backslaps (and suspicions of unfair advantage by means of statistical tests) came my way. I counted my gains. Fifty quid, folks. Fifty freakin' quid.

[In unrelated news, the wife's just announced that she is going shopping.]

Nov 22, 2008

Hawala and Honour

Financial transactions based on honour have a long history. In the ages before the advent of automatic encryption and digital signatures, when carrying cash on one's person was an invitation to murder, how did people pay and receive monies for goods and services?

In the peerless treasure-trove of papyri unearthed at Oxyrhynchos in Egypt is one example of financial documentation. Like all legal documents, this one carried a seal from one party. Seals, though, could be forged. To get around this problem, a 'Sign' was used - a piece of information known only to the two parties to the transaction would be entered into the contract.

Please transfer at your place in the Oxyrhynchite to Aurelios Herakleides son of Kephalon the poulterer, who lives in the same street as our brother Leonides, nine hundred drachmas of silver in imperial coinage, against which I have received the equal amount in full of nine hundred drachmas here in the village of Sesphtha, but do not hold him back. By way of Sign, the fact that I loaded up for you three hundred linen pieces when you embarked with Alexandros the linen-worker. This note of credit is binding and in answer to the formal question I have agreed to it. 1

The transactors were Sinpsanesneus and his son Leonidas; the Sign, very likely, was to be used only once; there was probably little counterparty risk, the parties being relatives. Honour, then as now, was a powerful incentive to keep to the letter of the transaction. Reputational risk was all.

What if the counterparties were not relatives at all? How to ensure that payments would be honoured? It is no surprise that the greatest advances in finance have always occurred in regimes with strong protection by law. For example, Italian merchants in the middle ages had no qualms to extend credit to people in Bruges or Avignon or London, but would be very wary of doing similar business in Germany or Scandinavia. In the areas where the Roman church had its long reach, financial transactions were protected; the bankers, therefore, thrived.

Except, of course, when they lent money to kings. Sovereign default after an unsuccessful war was a frequent reason for the collapse of mercantile banks. Sundry rulers of England forcibly took monies from banks (and Jews) in their jurisdiction, and even signed contracts; they would eventually refuse to pay, and that was that for the banks.

One of the greatest of medieval bankers was Giovanni di Bicci, of the family Medici. When he sent his officials to setup branches of his bank across Europe, he gave them very strict instructions.

Don't lend more than 300 florins to cardinals; to courtiers no more than 200; don't give credit to any Roman merchant, unreliable; nor to feudal barons, not even if they give you security (barons are a law unto themselves); and never, never lend money to Germans, since their courts won't respect your claim if, or rather when, things go wrong. 2

In the early days of the Medici, professionals of integrity and honour were hired as branch directors; they obeyed Giovanni's edicts without question, and the banks prospered. But there was always a rotten apple in the pile. In 1402, Neri di Cipriano took over the Venice branch and broke contract by lending to Germans.

Even Poles! He never recovered it. Faking the books, both manifest and secret, he invented a first-year profit and borrowed at 8 percent to have further capital, which he went on losing. Since the Medici did not routinely send inspectors to their various branches, it was three years before the now-considerable reversal of nearly 14,000 florins was discovered. 3

Neri was condemned by the Venice courts and he fled to Cracow, where he got back some of the owed money from the Poles. He never paid back the Medici.

References

  1. Tim Parks, Medici Money, Profile Books, 2005. Page 49.
  2. ibid, Page 50-51.

Sep 17, 2008

Chinese Water

The Financial Times's Global Events platform organised a conference yesterday on Investing in Commodity Currencies. In view of the current butchery in the financial markets, their choice of the venue was somewhat prescient: Butchers' Hall, home of one of the City of London's oldest livery companies. I'll post a synopsis of the various presentations later, but for now want to mention a tidbit about China that the Head of Research of Standard Chartered Bank shared with us.

As is well known, China's environmental record is somewhat less than stellar. One of the potential pitfalls it faces in its tremendous rush to grow and enrich its people is social unrest occasioned by, among other things, a severe scarcity of water, which only looks to worsen in the coming years. The Chinese government (or its Environmental ministry) has a six-level metric of water quality, which looks something like this:

Level 1: Potable water, fit for human use and consumption.
Level 2: Agricultural-use water
Level 3: Industrial-use water
Level 4: Fit for human recreation, but do not touch. (I guess this means you can row a boat on this but make bloody sure you don't fall in.)
Level 5: Unusable water

And, strangely enough,

Level 5+: Any water that remains which is not Level 5.

At this point, of course, the main hall of the Butchers was rocking with laughter.

The scary thing, though, is that 55% of China's water falls in categories 4 to 5+.

55%! No wonder they have all those appalling plans to divert the Himalayan rivers to the rest of the country. The lower riparian countries in South and South-East Asia are in for a hellish time if the Chinese go ahead with their madness.

  I attended the latest useR! conference this week, which lasted three days (Aug 12-14) at Dortmund. We've been using R at work for about a year or so now, and there's much to learn about this incredible statistical language and its ancillary 'packages', tools developed by academicians and practitioners in a variety of disciplines, all available free and online, supported by a vast cast of enthusiasts and gurus. So here I was, toting my little bag of goodies, and ambling from room to room to listen to some very interesting presentations across the R user spectrum.

The conference was held at the Statistics department of the Technical University of Dortmund. Only two weeks earlier, torrential rains had flooded the large auditorium of the department. Stains were still visible, but a massive cleanup before our arrival meant that everything appeared as it should - ready for four hundred visitors.

Unlike Curving Normality who blogged regularly and live from the various sessions he attended, I am doing this from back at home. I did take notes during the talks on a little pad that was given to us courtesy Google, but my handwriting these days is much worse than it used to be, and I doubt even a pharmacist would be able to make much of it. Still, here goes - summaries of three of the more interesting talks I attended.

The first talk I attended was on Loss Functions by a professor of actuarial studies, Vincent Goulet. Actuaries are interested in such things as ruin, the distribution of insurance claims, and the probabilistic properties of insurance payouts. To model these events, Goulet introduced an R package named 'actuar', in which he proposed several families of distributions, including those called censored. These, in particular, are interesting to insurance specialists. A client with a deductible is not going to make a claim if he thinks his damages cost less than the deductible to make good. In such a situation, the distribution of claims would be left-censored. Likewise, insurance payouts are usually capped by the size of the cover. Payouts, therefore, follow a right-censored distribution.

This is of relevance to us in finance as well, especially if we want to model the effects of management fees on a portfolio. Because irrespective of how well a manager performs, he always gets his management fee, the returns to a client from the manager are always that much less than the manager's overall performance. For the manager's revenue stream, on the other hand, there's an effective floor - and that can be modelled by a left-censored distribution.

An example of the multifarious uses of statistical tools came from Miriam Marusiakova, of the Charles University of Prague, who presented an R package 'forensic' to help in DNA fingerprinting. It is well-known that the DNA composition of any two human beings (other than identical twins) are distinct. Since it is unfeasible to compare DNA strands in their entirety from various possible sources,  forensic scientists have isolated certain markers that can serve as witnesses for distinction. Unfortunately, these markers themselves do not provide sufficiency of difference, and so a statistical analysis is required to determine how likely it is that the DNA found at a location came from one person or many.

Naturally, this is important! Let's say that a certain amount of DNA was found at a crime scene. There is a victim V and a suspect S. There are three possibilities: a portion of the DNA is known to be of the victim; there's only one type of DNA, suspected to be that of the offender; there's several sources of DNA found. The prosecution's hypothesis is that some of the DNA came from S. The defence's hypothesis is that the remaining DNA came from persons unknown U. How to determine which of the hypotheses is the correct one?

Miriam explained that external information needs to feed into the statistics. For instance, certain genetic factors are present to a greater or smaller degree in various populations. Not incorporating these factors into the statistics leads to overstating the case against the defendant. The classical probability law, named the Hardy-Weinberg law, is inapplicable in this case.

Another twist is that the offender and/or the victim, and the defendant are related! Usually, there is an assumption that the offender and the victim are independent. Miriam's package enables the analysis of all the above possibilities.

As a concrete example, she showed the widely different conclusions that could be drawn from the O.J. Simpson murder trial of the early 1990s in California. If the various factors and match probabilities were not estimated correctly, it was as easy to prove that the DNA found at the crime site was Simpson's as it was not. Lesson - estimate accurately and account for all possible variations.

The effervescent Janet Rosenbaum of Harvard University produced one of the most entertaining examples of research I've ever come across. She dealt with the notorious abstinence (virginity) pledge in the USA, and examined whether the sexual behaviour of teenagers who took the pledge was any different from those who didn't. (See here for some of her work, and this news report at the Washington Post.) I can do no better than quote from her very thorough abstract at the conference:

Objective: The US government spends over $200 million annually on abstinence-promotion programs, including virginity pledges, and measures abstinence program effectiveness as the proportion of participants who take a virginity pledge. Past research used non-robust regression methods. This paper examines whether adolescents who take virginity pledges are less sexually active than matched non-pledgers.

Previous researchers had compared the sexual behaviour of pledging teenagers against the general population of teenagers, and concluded that, indeed, the former were less likely to have had sex, and had a lower incidence of sexually-transmitted disease. For the US conservatives, this was brilliant news, meaning they could cut federal funding for contraception and women's sexual health, and provide instead abstinence coaching and use the numbers of pledgers as a metric of success.

But, of course, the comparison is not fair. The correct thing to do would be to match pledging teens with non-pledging teens who have similar backgrounds and ideologies. After all, the people who take the pledge are not average US teens. Many of them are from evangelical families, deeply religious, often born-again. When this matching is done, the results are quite clear:

Five years post-pledge, 84% of pledgers denied having ever pledged. Pledgers and matched non-pledgers did not differ in premarital sex, STDs, anal, and oral sex. Pledgers had 0.1 fewer past year partners, but the same number of lifetime sexual partners and age of first sex. Pledgers were 10 percentage-points less likely than matched non-pledgers to use condoms in the last year, and also less likely to use birth control in the past year and at last sex.

The behaviour of pledging and non-pledging teens is statistically identical! Worse, one to five years after having taken the pledge, 84% of those teens denied having pledged. Egregiously, many who had sex before taking the pledge declared themselves virgins shortly thereafter. To add insult to injury, pledgers were often more ignorant of contraception when they did succumb and have sex, and were thus less likely to protect themselves from disease or pregnancy before marriage.

Rosenbaum concluded that federal funds would be better spent in teaching effective birth and STD control than on abstinence measures.

Other interesting presentations:

  1. Tomoaki Nakatani, ccgarch: An R package for modelling multivariate GARCH with conditional correlations.
  2. Rory Winston, Real-Time Market Data Interfaces in R. (How to connect to Reuters from R)
  3. Susana Barbosa, ArDec: Autoregressive-based time series decomposition in R.
  4. Ray Brownrigg, Tricks and Traps for Young Players.
  5. Wei-Han Liu, A Closer Examination of Extreme Value Theory Modelling in Value-at-Risk Estimation.
  6. R. Ferstl, J. Hayden, Hedging Interest-Rate Risk with the Dynamic Nelson-Siegel Model.

Aug 2, 2008

Taxing Salt

Here's a brief litany. 2200 BC in China. 506 BC in Rome. 300 BC in Magadha. 1100s in Timbuktoo. 1259 in Provence. 1341 at the beginning of the Hundred Years' War. 1531 in Perugia. 1694 in Britain. 1759 in Bengal. 1825 in New York. 1866 in El Paso, Texas. And here's another: 1825 in Britain. 1946 in France. 1947 in India. What do they have in common?

The first set of dates are those of the establishment of monopolies or the imposition of taxes on that most innocuous of products - salt. From the earliest periods of history, rulers and merchants have realised that this essential commodity for human welfare is a generous source of income. The Chinese state took salt as tribute as early as 4200 years ago. The Romans were paying their soldiers an allowance to purchase salt (from which term derives 'salary'), and establishing control over the production of the commodity at the mouth of the Tiber. By 300 BC, both Chandragupta Maurya and the Romans had imposed salt taxes, the former because Kautilya thought it a good source of revenue for the empire, and the latter to finance the savage Punic Wars. In the twelfth century, the fabulous city of Timbuctoo was the entrepot to Black Africa to caravans carrying salt across the Sahara, and the merchants that owned the monopoly over this perilous business amassed great fortunes. There had always been little toll taxes on salt as on other products as they wound their way across fiefdoms. But with the Provencal tax of 1259, the gabelle established in 1341, and the later taxes in Perugia and Britain, began the modern and ruinous trend of taxing for war. There was no escape from these impositions.

Across Europe, the brutality of the French tax regime became known as a byword for oppression. Nowhere else had the tax been so prohibitive. Even in Bengal, under the Nawabs, the tax was minimal - 5% on Hindus, 2.5% on Muslims - and so inefficiently applied that the burden on the average person was slight. But the establishment of the East India Company and its conquest of Bengal created a system of levies on salt  that put even the French gabelle to shame.

In 1825, the Erie Canal connecting the Great Lakes to the Hudson River in New York, was inaugurated. It had been paid in large part by a tax on salt, which was one of the products that was transported over this engineering marvel. Meanwhile, in Texas, a bunch of monopolists had created the Salt Ring, which, in 1866, took over the production and distribution of salt. The local Mexicans, for whom the salt had been a common good, resented the monopoly, and rioted.

Interestingly, while the British were running one of the most brutal tax schemes in India, they had enlightened views towards salt in their own homeland. By 1825, they had abolished the tax. Those who suffered under the more severe burdens, such as the French and the Indians, had to wait till 1947 to be succoured.

Now, why is all this relevant? In Indian schools, we are taught that the Salt Tax that Gandhi opposed was a foreign imposition. This is untrue. The British took over existing salt taxes and multiplied them. There is a sense that somehow Indians laboured under a unique form of oppression. That is also clearly untrue. What is true, however, is the scale and ruthlessness of the tax in India, and its terrible consequences on the poor of the land.

In most other regimes, the tax added only a small fraction to the total cost of the salt. In China, for instance, a peasant needed only two days' income to pay for his family's annual salt requirements. In India, first under the East India Company and then under the Raj, a peasant had to shell out two months' wages.

Naturally, the poorest suffered. Salt deprivation severely affects the human body. It also debilitates farm animals. Milk and agricultural yields plummet, and affect exactly those people - the indigent - who are already facing the heaviest health burden. The well-off are not as affected unless the supply of salt itself is cut off. And with the establishment of the Customs Line that ran from Torbela in the Northwest Provinces to Sonapur in Orissa, the British managed to control not only production but also distribution of salt, netting themselves enormous profits from the suffering of millions.

The overwhelming control over salt wasn't accomplished overnight. The first step was to take over the production of marine salt, and this was achieved by the establishment of the sea-fortresses of Bombay, Calcutta and Madras. Soon after the Battle of Plassey, the East India Company acquired land near Calcutta that had salt works. Initially, the Company only doubled the ground rent and applied a small transit tax (eventually consolidated to a total tax of a fifth of a rupee per maund (82 pounds) of salt) - officially payable to the Mughal court because the Company was legally a feudal subordinate to them.  But after Plassey, the Company was able to enforce a treaty on the Mughals exempting themselves and other British merchants from paying any tax. This meant that employees in the company could begin to trade commodities on their own accounts, undercutting the Indian merchants, resulting in enormous profits for themselves and engendering severe internal corruption. Very little of the wealth generated from salt found its way into the Company's books.

That brilliant and conniving Robert Clive defeated Siraj-ud-Daulah and installed Mir Jafar as a puppet on the throne of Bengal. In return, he obtained 2,340,000 rupees as a lump sum, rentals of 3 lakhs annually, and an 880-square-mile private estate, all of which he took in his own name, rather than the Company's. Suddenly, he became one of the wealthiest men in England. Aware that shareholder action might take over some of this lucre, in 1760, he bought control of the Company. Then he purchased the favour of a sufficient number of rotten boroughs in England that neither he nor the Company would ever face parliamentary sanction.

Soon thereafter, the revenues of Bihar and Orissa fell into the Company's control. Again, most of them were appropriated by the employees. When Clive returned to India in 1765, even he was appalled: such a scene of anarchy, confusion, bribery, corruption and extortion was never seen or heard of in any country but Bengal; nor such and so many fortunes acquired in so unjust and rapacious a manner. He banned the taking of bribes and lavish gifts and curtailed the exemption from taxes to those of the Company's European staff with more than 5 years' service. But realising that he had to find the revenues to clean up the administration and keep his colleagues happy, he established a monopolistic Exclusive Company that was granted the right to raise revenue whichever way it wanted, on betel-nut, salt, tobacco. He modestly granted himself fifteen out of the 56 one-third shares issued. Despite the opposition from London, this monopoly lasted three years, during which it amassed a profit of 6.7 million rupees, all by almost doubling the wholesale price of salt from their works.

India, which had been comparatively well-off when the English arrived, was now beginning to sink into long-lasting penury.

The Company became ruthless in its collection of tax, even during the terrible Bengal famine of 1770. If the tax was not paid, the planting of crops was prevented. Along with nearly half of the peasants of the region, almost the entire indigenous supply chain of salt perished - workers, drivers, boatmen. Vast tracts of land were abandoned, and the once law-abiding Bengal fell into brigandage. The first smugglers of salt began to thrive.

Under the first Governor-General, Warren Hastings, the Company once again took over the manufacture of salt. It divided the salt-producing areas into Agencies, each of which was expected to procure salt from the indigenous workers (malangis) at a fixed price of Rs 2 a maund. The malangis only received about half a rupee, so the effective tax on salt, once only about 0.3 rupees a maund, became five times as much.

By 1788, the Company had realised that fixing the price was inefficient. They began to hold auctions for wholesalers. Enthusiastic bidding led to the tripling of the wholesale price. The effective tax jumped to 3.25 rupees a maund. At a time when the average labourer made one or two rupees a month, salt was already pretty much unaffordable. The ramifications on the health of the poor were catastrophic. The terrible state of affairs was to last a century.

While the Bengal Presidency was making its money from the salt tax, the other two - Madras and Bombay - were enriching themselves mainly from ground rents. This meant that there was ample opportunity for tax arbitrage between the various parts of British India. Meanwhile, the other princely states were not punitively taxing salt in their domains. Furthermore,they had large sources of rock-salt and lake-salt, which were outside British control. As was to be expected, smuggling became a rampant problem across Bengal, particularly over its frontiers with the princely states. The Company had to end this once and for all.

First, they conquered the entire eastern seaboard of India, so that the coast and the salt-making facilities there fell into their control. The defeat of the Marathas resulted in the extension of Company rule into almost all of Northern India. Then they installed rowannah chowkies, Customs posts, throughout the occupied territories, across major roads and waterways. But even these could not stem the influx of salt from the neighbouring independent principalities.

Sambhar Lake was the principal source of salt smuggled into Bengal. This was under the suzerainty of the Maharajahs of Jaipur and Jodhpur. With some effective strong-arming, the British were able to terrify the rulers into ceding Sambhar and other smaller salt lakes into their hands. After the bitter famine of 1876, land abandoned in the southern Presidencies meant that ground rent revenues there plummeted. Following a comprehensive review of taxation in the country in 1879, it was decided that the salt tax in Bengal would be dropped slightly, but that in Bombay and Madras would be raised. Smuggling across the Presidencies no long made economic sense. Cheap salt vanished across the subcontinent.

The British domination of salt in India was thereby complete.

[NOTE: All the facts quoted in this post are from Roy Moxham's The Great Hedge of India, published by Constable Press. London. 2001.]

Jun 2, 2008

Dharmic Finance

After a brief hiatus, I'm reading the Financial Times again. And what wondrous news does it report today? Why, nothing short of investing based on dharmic principles.

Christians and ethical humanists have been hitherto served with appropriate investment vehicles, notably indices of ethically-run companies. Greens and Muslims also have their beliefs appropriately treated. Until recently, however, that large bastion of humans that believes in karma, dharma (and possibly) yoga have been unappreciated and ignored. All that is set to change with the introduction by Dow Jones Indexes, in association with Dharma Investments), of five indices - a global one, and one each for the US, India, Japan, and the UK.

It's all deliciously arranged. What is a Dharmic investment? Why, Rishi Kanada has something to say on the matter.
That which leads to the attainment of Abhyudaya (prosperity in this world) and Nihsreyasa (total cessation of pain and attainment of eternal bliss hereafter) is Dharma.
Naturally, this means making a lot of money now - after death, who can know? All pain might be relieved. Or not. Luckily, the Hindu scriptures - unlike the Abrahamic ones - do not object to lucre and usury. And so the entire banking sector can safely be incorporated into the index.

Companies dealing with meat or alcohol are no-no. Pharmaceutics are eschewed owing to their treatment of animals. Defence-related corporations are given the old heave-ho. But outfits that serve to improve life and its quality in these three dimensions are welcome.

Cleverly, the authors of this set of indices also point out that - had they created it and invested in it at the end of 2002 - it would have returned 115.01%, handily outperforming the 106.62% of the Dow Jones World Index. (We dare not ask what the returns would have been adjusted for risk.)

So why not go forth, folks, and invest?* Rest assured that a band of clerics (who, though?) have certified these indices in accordance with Hinduism. You may, of course, discount the knowledge that these clerics have been paid nicely for their imprimatur. After all, as the sages have it, Shubh Labh. May Lakshmi smile on you.

* Please include me out.

May 24, 2008

Conferring

There are several benefits to attending a conference. One overhears some interesting gossip. One supposedly learns a thing or two about one's field. One may, if one is overwhelmed by the awesome weather, sleep through a particularly boring presentation with no qualms. And one may also have the opportunity to inveigh against those who have the temerity to not attend the conference after their paper has been accepted.

As you can perceive, I had the opportunity to participate in each of these delicious activities. [As mentioned earlier in the week, I was in Aix-en-Provence, attending the Forecasting Financial Markets 2008 conference.] Chief among them was the gossip. Academics are like old people in this regard. They trade titillation and amusement and raised eyebrows. Unfortunately, I missed out on all these. At my table during lunch, there were, instead, hagiographies of the worthies of the world of financial econometrics. "What a fellow," said one professor admiringly of Mark Taylor.

Mark Taylor, of course, is well-known in our field. He read for a Politics, Philosophy and Economics degree as an undergraduate at Oxford (you can't study any of these in isolation, it appears) and worked in the financial industry for a bit. He then got himself a PhD from Birkbeck College and obtained a faculty position at University College, Oxford. Here, because his doctorate was not Oxon. or Cantab., he was addressed by his colleagues as Mister. The snobbery extended to virtually all his dealings with them, despite his steady progress to the heights of achievement in his field. Eventually, he left them and joined the University of Warwick, where he remains to this day.

Of course, he missed the perks of the high table and the elaborate system designed to support an academic at Oxford for conferences and things. Warwick, in comparison, is a bit of a backwater. But in the interim, he managed - while raising a family, publishing solid research and editing several journals - to obtain an MA in English Literature. And, tiring of paying expert repairers of antique clocks (the family hobby) through the nose, he apprenticed himself to one of the master clockwrights, and learned the trade.

Where the devil does he find the time?

Anyway. The FFM conference is bedevilled by one serious problem - that of presenters not showing up to present their papers after acceptance. For one thing, this completely screws up the scheduling. For another, many of them don't bother to pay the conference fee either, which results in the financial difficulties for the organisers. And finally it is incredibly frustrating for attendees who were looking forward to learning something new on a topic of interest.

I'm not sure what the deal is in the other disciplines, but this lack of attendance appears to be a serious canker among financial conferences.

The main reason for this sad lack of professionalism appears to be that it suffices for a paper to be accepted at a conference to appear on an academic's resume. We mulled over several solutions to this problem. One possibility is not to publish the accepted list of papers until the authors pay up. Another is not to do so unless they present (but why would they present unless they were told their paper was accepted?)

The FFM used to be held in London for years, and provided at one time a good mix of presentations from professionals in the finance industry and academics. These days, though, it is skewed more and more towards the ivory tower. People such as I turn up hoping to learn some new techniques in financial modelling, but some of the academic work is so removed from the day-to-day grind that it would take a person with considerably higher IQ than me to make it applicable to our grotty world of money-making.

I presented a piece of work done jointly with the head of my group. From a statistical standpoint, it was probably not completely rigorous, and I had hoped to obtain some feedback on how to strengthen the work (which I did get). For anyone who is interested, the work dealt with the extraction of currency positioning information by the use of peer-group benchmarks. For currency managers, this is interesting, because it's known that when positions get stretched (i.e., say, there's considerable selling of the US dollar and lots of buying of the Japanese yen), the positions tend to unwind rapidly, and there's usually short-term turmoil in the markets. This happens fairly regularly - so can one forecast it? A peer-group benchmark is an index that tracks the daily aggregated performance of a bunch of currency managers, and there are several published by various sources. If we, by means of our simple approach, can determine that our competitors in other banks are positioned in one particular way, and we have an indication thereby that those positions are stretched, we could take the opposite position, for example, and make a profit when the market snaps back.

Somewhat surprisingly, the simplicity of the approach won us some favourable comment, and the one or two enthusiastic questioners were inclined to suggest more rigorous statistical methods to make our results robust. They also mooted a possible collaboration, and this is something we'll have to take seriously, although I did point out that our market priorities change so often that it was unclear how much time or effort we could spend on further developing the work.

Aix is a lovely little town, and the local council provides some amount of funding for the conference. But the FFM has been held here for four years in a row now, and the organisers are thinking of alternative venues.

Luxembourg, anyone?

May 19, 2008

More Trips

And I'm not speaking of the Indian cricket team's ex-wicketkeeper's clumsiness either.

Just got back from a rather tame trip to Frankfurt (enlivened by sudoriparous sales folk as they drove us to clients at 180 kmph, and said clients then assailed us with garlic breaths), and am off to the FFM 2008 conference tomorrow. Presenting a paper which is sure to be met with askance looks by academics, and hoping to escape with minor injuries.

A revêr, as they say in Provençal!

We came back from Scotland wielding gleaming Scottish pound notes and handed one to the minicab driver who brought us home from the train station.

"What is this?" he asked.

"£20," I replied, waving the note issued by Clydesdale Bank in his face.

He turned to look at me, aghast.

"It's Scottish money," I said.

"What!" he yelped. "I want English money. I can't do anything with this."

He was, of course, a recent immigrant into this country, and unaware of the glorious tradition of the land that allows the Scots and the Northern Irish to print their own money. And he probably didn't go anywhere near a bank either, to change the money into something he considered suitable. So I had to poke around and shovel a handful of coins into his eager hands.

Three Scottish banks print money: Clydesdale (an example of a £5 note from 1865 to the left), Halifax Bank of Scotland, and the Royal Bank of Scotland. There are several advantages to doing so. One is called seigniorage, a profit one accrues by selling one's notes to other banks (it's the difference between the face value of the note and the cost of producing it). The second is - interest! The three banks are required to hold reserves at the Bank of England - UK's monetary authority - equal to 95% of their printed circulation, but only from Friday to Sunday. From Monday through Thursday, the reserves can be placed with other banks or invested in other assets to earn interest. During that time, if the issuing bank goes under, anyone holding its banknote will find that he or she cannot redeem the money. He or she, in other words, is sunk.

The banks earn a tidy sum in interest and seigniorage, and would stand to lose most of it were a recent decision by the Treasury to force the banks to maintain their reserves all seven days of the week to become law. It would no longer be worth their while to print money. The nationalist government in Scotland is outraged. Scottish banks are amongst the stablest in the world, they claim.

Of course, people spooked by the recent bank runs on Northern Rock would very likely appreciate the additional guarantees consequent to the order by the Treasury.

Check out a history of Scottish banknotes here.

The Economist is where I encountered this story recently.

Jan 22, 2008

Herds and Markets

After the spectacular equities slump of yesterday and today, and the resulting decrease in the probability of the boy going to Harvard as a fee-paying student (fees to be met by us, his parents, of course), I pondered about herd behaviour, efficient markets and associated paradoxes.

The matter is simple to explain. Most savvy investors would have known early last year that, owing to the inversion of the US yield-curve, the Americans were heading into recession. This is not a foregone conclusion, of course; a better restatement would be that the slope of the US yield curve is a good predictor of future recession in the country (and indeed, owing to the coupling of global economies, the rest of the world as well). Now if the said savvy investors had shorted the market then, they might have panicked a bit when the Dow Jones hit all-time highs in the ensuing months, but - as the yield curve remained inverted - they would have continued to hold to their underlying conviction that the markets would, sooner or later, tank. Rationally, therefore, they should have continued to hold their short positions.

But hang on a tick, as Austin Powers said. If the markets are efficient and are manifestations of all available information, why were they climbing? Did this mean that the market, that is, the vast majority of the participants (you and I and other investors) disbelieved the yield curve theory? In short, there was no impending recession? Well, then, we ought not to have shorted the market as we did. In which case, we'd have ridden up, gloated, and crashed yesterday.

So here's the paradox. If everyone believed that the markets were efficient, nobody would use price-relevant information to time the market, and so the information dispersal would not be complete and so the markets would not be efficient. This paradox has been studied by behavioural economists and other theoreticians, and if they have a solution, I still don't know what it is.

Here's another problem. Much of a working man's wealth (if not locked into his house) is in his pension. A working woman's, too. Most pensions do not allow one to short the market. Of course, if one is invested in an active fund, one would fervently hope that the manager of the fund would be shorting on one's behalf. Clearly, that hasn't happened in the past several months. So all our pensions very likely have tanked.

What's worse is that ostensibly clever investors such as I, diversifying across the world, have been slimed royally by the downturn.

To top it all, we are averse to keeping a cash reserve in the brokerage accounts just for the possibility of buying low when the markets do collapse. After all, who can tell when that will happen? A cash position with a broker would earn almost no interest at all. What a waste of capital in these inflationary times! So now that the Sensex has fallen - and how! - I am unable to buy into the dip because, very likely, by the time I transfer funds into my brokerage, the markets may have recovered...

My son, old buddy, you won't be going to Harvard in a hurry, I'm afraid.