NOTE: this "review" is less about what I thought of the book, and more about what the book itself is about. So - spoiler alert?
It's All About the Fund
As the title suggests, "When Genius Fails" is about the "Rise and Fall of Long-Term Capital Management." Don't expect to learn why the economy itself went to shit, causing LTCM to lose ungodly sums of money. The main character of this tale is the fund itself, and Lowenstein does a fine job of documenting its meteoric rise and catastrophic fall.
LTCM began as the "largest startup of all time"; the first round of fundraising weighed in at $1.25B. Started by John Meriwether and a group of quants, LTCM's strategy was to find arbitrage opportunities and magnify them using a tremendous amount of leverage. Lowenstein does a pretty good job of explaining LTCM's various trading strategies.
Bond Arbitrage
Initially, LTCM engaged primarily in "bond arbitrage"; they would search the markets for unusually large spreads between treasury bills and futures on those bills. If a spread seemed too large, LTCM would buy the futures, sell the bills, and wait for the spread to converge. At this point they would liquidate their positions and take home a nice, "riskless" profit.
Risk vs. Uncertainty
Now, nothing is "riskless," and this is especially true in financial markets. The book does a good job of explaining why. The reason has to do with the difference between risk ("will there be an earthquake tomorrow?') and uncertainty ("will the coin land heads or tails?").The difference here is that while we don't know how the coin will land, we can exactly specify the odds: it's 50/50. On the other hand, it's unclear what the "odds" of an earthquake occurring tomorrow are. We can examine geological data, examine historical records, and so on, but it's unclear exactly how this risk should be quantified.
The primary mistake of LTCM, according to the author, was to mistakenly equate risk with uncertainty. In this case, "risk" refers to the fact that we don't know what the price of securities will be in the future. More specifically, the traders at LTCM looked at past volatility and assumed that future volatility would be the same. They assumed that predicting the future price of a security is like predicting the outcome of a coin flip: though we don't know what will happen, we do know what the distribution of outcomes looks like. However, predicting the future price of securities is more like predicting an earthquake – that is, we don't really know what the distributions of outcomes looks like.
Uncertain Assumptions
Many of LTCM's models were based assumptions that are commonly made in mathematical finance:
- volatility is constant over time
- prices change in continuous time
- the distribution of returns is given by a lognormal distribution
- returns are independently and identically distributed
These are common assumptions; they simplify models, make calculations tractable, and are often quite accurate. The keyword here is "often." The problem with LTCM was that they took these assumptions very seriously. Under these assumptions, their strategies were calculated to be incredibly non-risky. And for a couple years, while the economy was chillin', the modeling assumptions seemed to apply, and LTCM made insane amounts of money.
Beyond Bond Arbitrage
Before long, LTCM wasn't the only kid on the block engaging in bond arbitrage, which meant that opportunities started drying up. Sitting on mountains of unused cash, LTCM had to branch out, and started engaging in new strategies. These included
- Merger Arbitrage: betting that an announced acquisition would close, meaning that the stock prices of the two merging companies would become the same
- Purchasing exotic bonds from countries like Russia
- Betting on equity volatility: one of the things that dictates the price of an option is the presumed volatility of the underlying asset. LTCM made bets that this "presumed volatility" (as implied by option prices) was too high
All Goes to Shit
And then, a couple of "earthquakes" hit. Russia defaulted on its debt (there go those exotic bonds); spreads on bonds began to widen; and equity volatility kept going up. The shit of a couple of countries around the world hit the fan, and the world economy was affected to an unprecedented and unexpected extent.
Too Much Leverage
Now, this might not have been an issue: though spreads kept widening and volatility kept going up, LTCM, in theory, could have just sat on its assets and waited for everything to settle down. In practice, they were leveraged at more than 30:1, and thus as their positions dropped, they had to start paying out.
And their positions continued to drop – to extremes that their models predicted shouldn't occur in more than once every couple of lifetimes of the universe. It turns out that in times of crisis, returns are not independent and identically distributes; prices aren't continuous; and volatility isn't constant. Indeed, returns are not lognormally distributed – they have fat tails, allowing for extreme outcomes that are much more likely to occur than a normal distribution would predict. In good times, LTCMs returns were compounded by its insane leverage; in bad times, its losses were magnified.
The Fed Steps In
In less than 5 weeks, LTCM would go on to lose more than 3.6 billion of their money. They were on the verge of going under, and – with $100 billion in assets under management and $1 trillion in derivative exposure – they were going to do some serious damage to the various banks that had lent them money. Thus, the fed stepped in. The federal reserve got together some 15 banks, and asked them to piece together some $4 billion to buy LTCM – in effect, it asked the banks to get together and "bail the hedge fund out."
Now, here an important point that I've always misunderstood and that has been inaccurately portrayed by the media: the fed did not bail out LTCM. The fed simply organized the bailout committee. In other words, it was not taxpayer money that financed the bailout. The extent to which this has been underemphasized by the media is ridiculous.
Surveying the Damage
These 15 or so banks accumulated $3.65 billion, and essentially bought the fund out (they did this to avoid the damage they would have incurred had it gone down in a firesale). I was always under the impression that most of LTCM's losses resulted from Russia defaulting on its debt. And indeed, LTCM lost $420M on Russia. But they lost much more betting on swaps – $1.6B – and almost as much betting on volatility – $1.3B. Altogether, LTCM lost most than $4.5B, $3.6B of which they lost over the course of 5 weeks. Over the course of four years, a dollar invested quadrupled to $4.11. Less than five months later, this same dollar was worth only 30 cents.
Final Comments
Lowenstein is a good writer, and this account is entertaining throughout. I was hoping for some more context – you don't get a good sense for what was happening in the economy at large during this time –but as far as LTCM's story is concerned, you get the full scoop. If you don't much care about what happened to Long Term Capital Management, you won't mush care for this book – but if you've even a passing interest, it's a surprisingly assessable and pretty entertaining account.