Money and Finance
- Excerpt From Chapter 1 Of Quantitative Value By Wesley Gray And Tobias Carlisle
This book is organized into six main parts. Part One sets out the rationale for quantitative value investment and introduces our checklist. In it we examine several simple quantitative value strategies to illustrate some key elements of the investment...
- Nassim Taleb's Foreward To "lecturing Birds On Flying"
From a couple of years ago. January 2009: I am at the World Economic Forum in Davos, looking at the sorry crowd of businessmen, journalists, and bankers. There are also a few finance academics. Many practitioners look like they have just fallen off a...
- Ten Principles For A Black Swan-proof World - By Nassim Nicholas Taleb
1. What is fragile should break early while it is still small. Nothing should ever become too big to fail. Evolution in economic life helps those with the maximum amount of hidden risks – and hence the most fragile – become the biggest. 2. No socialisation...
- The Fourth Quadrant: A Map Of The Limits Of Statistics - By Nassim Nicholas Taleb
Statistical and applied probabilistic knowledge is the core of knowledge; statistics is what tells you if something is true, false, or merely anecdotal; it is the "logic of science"; it is the instrument of risk-taking; it is the applied tools of epistemology;...
- Inside Wall Street's Black Hole By Michael Lewis
In my opinion, one should just file Black-Scholes in the same category as the Efficient Market Hypothesis/Theory, the Capital Asset Pricing Model (CAPM), Beta, etc. That category, to borrow a term from Charlie Munger, should be labeled TWADDLE. But let's...
Money and Finance
Bystanders to this financial crime were many - By Nassim Nicholas Taleb and Pablo Triana
A crime has been committed. Yes, we insist, a crime. There is a victim (the helpless retirees, taxpayers funding losses, perhaps even capitalism and free society). There were plenty of bystanders. And there was a robbery (overcompensated bankers who got fat bonuses hiding risks; overpaid quantitative risk managers selling patently bogus methods).
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Let us start with the bystander. Almost everyone in risk management knew that quantitative methods – like those used to measure and forecast exposures, value complex derivatives and assign credit ratings – did not work and could provide undue comfort by hiding risks. Few people would agree that the illusion of knowledge is a good thing. Almost everyone would accept that the failure in 1998 of Long Term Capital Management discredited the quantitative methods of the Nobel economists involved with it (Robert Merton and Myron Scholes) and their school of thought called “modern finance”. LTCM was just one in hundreds of such episodes.
Let us start with the bystander. Almost everyone in risk management knew that quantitative methods – like those used to measure and forecast exposures, value complex derivatives and assign credit ratings – did not work and could provide undue comfort by hiding risks. Few people would agree that the illusion of knowledge is a good thing. Almost everyone would accept that the failure in 1998 of Long Term Capital Management discredited the quantitative methods of the Nobel economists involved with it (Robert Merton and Myron Scholes) and their school of thought called “modern finance”. LTCM was just one in hundreds of such episodes.
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Yet a method heavily grounded on those same quantitative and theoretical principles, called Value at Risk, continued to be widely used. It was this that was to blame for the crisis. Listening to us, risk management practitioners would often agree on every point. But they elected to take part in the system and to play bystanders. They tried to explain away their decision to partake in the vast diffusion of responsibility: “Lehman Brothers and Morgan Stanley use the model” or “it is on the CFA exam” or, the most potent argument, “modern finance and portfolio theory got Nobels”. Indeed, the same Nobel economists who helped blow up the system at least once, Professors Scholes and Merton, could be seen lecturing us on risk management, to the ire of one of the authors of this article. Most poignantly, the police itself may have participated in the murder. The regulators were using the same arguments. They, too, were responsible.
Yet a method heavily grounded on those same quantitative and theoretical principles, called Value at Risk, continued to be widely used. It was this that was to blame for the crisis. Listening to us, risk management practitioners would often agree on every point. But they elected to take part in the system and to play bystanders. They tried to explain away their decision to partake in the vast diffusion of responsibility: “Lehman Brothers and Morgan Stanley use the model” or “it is on the CFA exam” or, the most potent argument, “modern finance and portfolio theory got Nobels”. Indeed, the same Nobel economists who helped blow up the system at least once, Professors Scholes and Merton, could be seen lecturing us on risk management, to the ire of one of the authors of this article. Most poignantly, the police itself may have participated in the murder. The regulators were using the same arguments. They, too, were responsible.
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So how can we displace a fraud? Not by preaching nor by rational argument (believe us, we tried). Not by evidence. Risk methods that failed dramatically in the real world continue to be taught to students in business schools, where professors never lose tenure for the misapplications of those methods. As we are writing these lines, close to 100,000 MBAs are still learning portfolio theory – it is uniformly on the programme for next semester. An airline company would ground the aircraft and investigate after the crash – universities would put more aircraft in the skies, crash after crash. The fraud can be displaced only by shaming people, by boycotting the orthodox financial economics establishment and the institutions that allowed this to happen.
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Bystanders are not harmless. They cause others to be bystanders. So when you see a quantitative “expert”, shout for help, call for his disgrace, make him accountable. Do not let him hide behind the diffusion of responsibility. Ask for the drastic overhaul of business schools (and stop giving funding). Ask for the Nobel prize in economics to be withdrawn from the authors of these theories, as the Nobel’s credibility can be extremely harmful. Boycott professional associations that give certificates in financial analysis that promoted these methods. Remove Value-at-Risk books from the shelves – quickly. Do not be afraid for your reputation. Please act now. Do not just walk by. Remember the scriptures: “Thou shalt not follow a multitude to do evil.”
Bystanders are not harmless. They cause others to be bystanders. So when you see a quantitative “expert”, shout for help, call for his disgrace, make him accountable. Do not let him hide behind the diffusion of responsibility. Ask for the drastic overhaul of business schools (and stop giving funding). Ask for the Nobel prize in economics to be withdrawn from the authors of these theories, as the Nobel’s credibility can be extremely harmful. Boycott professional associations that give certificates in financial analysis that promoted these methods. Remove Value-at-Risk books from the shelves – quickly. Do not be afraid for your reputation. Please act now. Do not just walk by. Remember the scriptures: “Thou shalt not follow a multitude to do evil.”
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Related previous posts:
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A conversation about economics with Nassim Taleb
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THE FOURTH QUADRANT: A MAP OF THE LIMITS OF STATISTICS - By Nassim Nicholas Taleb
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Related books:
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The Black Swan: The Impact of the Highly Improbable
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Fooled by Randomness: The Hidden Role of Chance in Life and in the Markets
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Fooled by Randomness: The Hidden Role of Chance in Life and in the Markets
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Lecturing Birds on Flying: How Financial Practice Differs from Theory (comes out next year)
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- Excerpt From Chapter 1 Of Quantitative Value By Wesley Gray And Tobias Carlisle
This book is organized into six main parts. Part One sets out the rationale for quantitative value investment and introduces our checklist. In it we examine several simple quantitative value strategies to illustrate some key elements of the investment...
- Nassim Taleb's Foreward To "lecturing Birds On Flying"
From a couple of years ago. January 2009: I am at the World Economic Forum in Davos, looking at the sorry crowd of businessmen, journalists, and bankers. There are also a few finance academics. Many practitioners look like they have just fallen off a...
- Ten Principles For A Black Swan-proof World - By Nassim Nicholas Taleb
1. What is fragile should break early while it is still small. Nothing should ever become too big to fail. Evolution in economic life helps those with the maximum amount of hidden risks – and hence the most fragile – become the biggest. 2. No socialisation...
- The Fourth Quadrant: A Map Of The Limits Of Statistics - By Nassim Nicholas Taleb
Statistical and applied probabilistic knowledge is the core of knowledge; statistics is what tells you if something is true, false, or merely anecdotal; it is the "logic of science"; it is the instrument of risk-taking; it is the applied tools of epistemology;...
- Inside Wall Street's Black Hole By Michael Lewis
In my opinion, one should just file Black-Scholes in the same category as the Efficient Market Hypothesis/Theory, the Capital Asset Pricing Model (CAPM), Beta, etc. That category, to borrow a term from Charlie Munger, should be labeled TWADDLE. But let's...