Thursday, June 24, 2010

The Quants: How a New Breed of Math Whizzes Conquered Wall Street and Nearly Destroyed It

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“Beware of geeks bearing formulas.”
--Warren Buffett
 
In March of 2006, the world’s richest men sipped champagne in an opulent New York hotel.  They were preparing to compete in a poker tournament with million-dollar stakes, but those numbers meant nothing to them.  They were accustomed to risking billions.  
 
At the card table that night was Peter Muller, an eccentric, whip-smart whiz kid who’d studied theoretical mathematics at Princeton and now managed a fabulously successful hedge fund called PDT…when he wasn’t playing his keyboard for morning commuters on the New York subway.  With him was Ken Griffin, who as an undergraduate trading convertible bonds out of his Harvard dorm room had outsmarted the Wall Street pros and made money in one of the worst bear markets of all time.  Now he was the tough-as-nails head of Citadel Investment Group, one of the most powerful money machines on earth. There too were Cliff Asness, the sharp-tongued, mercurial founder of the hedge fund AQR, a man as famous for his computer-smashing rages as for his brilliance, and Boaz Weinstein, chess life-master and king of the credit default swap, who while juggling billion worth of positions for Deutsche Bank found time for frequent visits to Las Vegas with the famed MIT card-counting team.  
 
On that night in 2006, these four men and their cohorts were the new kings of Wall Street.  Muller, Griffin, Asness, and Weinstein were among the best and brightest of a  new breed, the quants.  Over the prior twenty years, this species of math whiz --technocrats who make billions not with gut calls or fundamental analysis but with formulas and high-speed computers-- had usurped the testosterone-fueled, kill-or-be-killed risk-takers who’d long been the alpha males the world’s largest casino.  The quants believed that a dizzying, indecipherable-to-mere-mortals cocktail of differential calculus, quantum physics, and advanced geometry held the key to reaping riches from the financial markets.  And they helped create a digitized money-trading machine that could shift billions around the globe with the click of a mouse.  
 
Few realized that night, though, that in creating this unprecedented machine, men like Muller, Griffin, Asness and Weinstein had sowed the seeds for history’s greatest financial disaster.  
 
Drawing on unprecedented access to these four number-crunching titans, The Quants tells the inside story of what they thought and felt in the days and weeks when they helplessly watched much of their net worth vaporize – and wondered just how their mind-bending formulas and genius-level IQ’s had led them so wrong, so fast.  Had their years of success been dumb luck, fool’s gold, a good run that could come to an end on any given day?  What if The Truth they sought -- the secret of the markets -- wasn’t knowable? Worse, what if there wasn’t any Truth?
 
In The Quants, Scott Patterson tells the story not just of these men, but of Jim Simons, the reclusive founder of the most successful hedge fund in history; Aaron Brown, the quant who used his math skills to humiliate Wall Street’s old guard at their trademark game of Liar’s Poker, and years later found himself with a front-row seat to the rapid emergence of mortgage-backed securities; and gadflies and dissenters such as Paul Wilmott, Nassim Taleb, and Benoit Mandelbrot.  
 
With the immediacy of today’s NASDAQ close and the timeless power of a Greek tragedy, The Quants is at once a masterpiece of explanatory journalism, a gripping tale of ambition and hubris…and an ominous warning about Wall Street’s future.
  

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±1±: Best Buy Lofty Mathematical principles applied to finances and real-life can make for exciting reading. First example: Ariel Rubinstein had been toiling through an article on how to apply mathematics to games; and at length the economist found himself, as the sharpness of his focus waned, seeking respite from the tedium in Edgar Allan Poe's short story "The Purloined Letter." But the economist's work, it seemed, wouldn't let him rest. For in the middle of the detective story, Poe launched into an analysis of mathematics and game theory! Rubinstein read in Poe:

"I knew one about eight years of age, whose success at guessing in the game of `even and odd' attracted universal admiration. This game is simple, and is played with marbles. One player holds in his hand a number of these toys, and demands of another whether that number is even or odd. If the guess is right, the guesser wins one; if wrong, he loses one.
"The boy to whom I allude won all the marbles of the school. Of course he had some principle of guessing; and this lay in mere observation and admeasurement of the astuteness of his opponents. For example, an arrant simpleton is his opponent, and, holding up his closed hand, asks, `are they even or odd?' Our schoolboy replies, `odd,' and loses; but upon the second trial he wins, for he then says to himself, `the simpleton had them even upon the first trial, and his amount of cunning is just sufficient to make him have them odd upon the second; I will therefore guess odd;' -- he guesses odd, and wins.
"Now, with a simpleton a degree above the first, he would have reasoned thus: `This fellow finds that in the first instance I guessed odd, and, in the second, he will propose to himself, upon the first impulse, a simple variation from even to odd, as did the first simpleton; but then a second thought will suggest that this is too simple a variation, and finally he will decide upon putting it even as before. I will therefore guess even;' -- he guesses even, and wins.

"Now this mode of reasoning in the schoolboy, whom his fellows termed `lucky,' -- what, in its last analysis, is it?'
`It is merely,' I said, `an identification of the reasoner's intellect with that of his opponent.'"

Later he found that the mathematics within game theory prevailed. There was no statistically significant difference between how often each player won (SN: 7-08).

Second Example is in the fast-paced story of "The Quants," Wall Street Journal reporter Patterson explores the role of mathematicians behind the financial crash of 2008. The tale follows investors who are called the Quants forasmuch as they use complicated abstract mathematics and computers to gain millions of dollars through the applying the results to the market.

This true-life plot is fascinating and simple to understand, however some financial terminology can be a bit difficult to comprehend, yet the story of applied mathematical high-jinks and excessive prosperity along with the fast rise and upcoming fall is absolutely captivating.

"For the most part I do the thing which my own nature drives me to do" (Albert Einstein).
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Wednesday, June 16, 2010

The Big Short: Inside the Doomsday Machine

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The #1 New York Times bestseller: a brilliant account—character-rich and darkly humorous—of how the U.S. economy was driven over the cliff. When the crash of the U. S. stock market became public knowledge in the fall of 2008, it was already old news. The real crash, the silent crash, had taken place over the previous year, in bizarre feeder markets where the sun doesn’t shine, and the SEC doesn’t dare, or bother, to tread: the bond and real estate derivative markets where geeks invent impenetrable securities to profit from the misery of lower- and middle-class Americans who can’t pay their debts. The smart people who understood what was or might be happening were paralyzed by hope and fear; in any case, they weren’t talking.

The crucial question is this: Who understood the risk inherent in the assumption of ever-rising real estate prices, a risk compounded daily by the creation of those arcane, artificial securities loosely based on piles of doubtful mortgages? Michael Lewis turns the inquiry on its head to create a fresh, character-driven narrative brimming with indignation and dark humor, a fitting sequel to his #1 best-selling Liar’s Poker. Who got it right? he asks. Who saw the real estate market for the black hole it would become, and eventually made billions of dollars from that perception? And what qualities of character made those few persist when their peers and colleagues dismissed them as Chicken Littles? Out of this handful of unlikely—really unlikely—heroes, Lewis fashions a story as compelling and unusual as any of his earlier bestsellers, proving yet again that he is the finest and funniest chronicler of our times.

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±1±: Best Buy Mr. Lewis capably argues that our economic mess is the fault of financial dealings so specialized that nobody bothered to actually think about what was happening; nobody actually read the fine print. Because the best and brightest are tasked with simply making money, the system got turned into a feedback loop that exploded; leaving us about a trillion dollars in the hole. The genius of the book is that Mr. Lewis demonstrates how and why nobody but a few wise traders had the incentive or desire to do anything about the problem, which was essentially that some very smart people created worthless assets that they convinced the entire investment banking system to purchase in quantities that stagger the mind. Mr. Lewis invites us to ponder the incentives that make our markets and economy work.

A good argument can be made that our political system is headed into the same trap. The elected officials and we, the electorate, do not understand the complexities of government and modern global politics. Just as it took a gentleman with Asperger's to hone in on the mind-numbing text of a CDO that nobody else read, we have a Congress that passed a hopelessly complex health-care reform bill and I am confident that when that mess blows up we will be reading a story written by one of the very few that actually powered through the full text of the bill that the real decisionmakers refused to read. We insist on simplifying complex issues without reaching for an understanding. By so doing we risk building a political structure that is as flimsy as was the financial structure of the asset-backed securities markets.

The book did a great job of explaining the complexities of high-finance. Obviously everything is clearer in hindsight. I'm no Einstein, but I can reach for any number of books that can help me wrap my mind around his ideas. True genius sees the truth before everyone else and that was the message of this book. We don't all have to be experts, but we need to insure that there are experts working for us and not for themselves. There are people out there who understand exactly what is wrong with the world and we need to provide them with incentives to share their observations and prevent the rest of us from driving off a cliff.

Every voter in any industrialized democracy should have a duty and obligation to learn what happened with the CDO debacle, we cannot hope to prevent a future bubble if we do not take the lessons from this experience. Fortunately, the government was able to step in and prevent credit markets from completely breaking down--it seems, to this reviewer at least, that the economy was not dealt a fatal blow, but how close we came should be the focus and study of every concerned citizen. on Sale!

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