Jim Simons is less famous than George Soros or Warren Buffett, but no less successful
investors’ strategies often sound simple. “Whether it’s socks or stocks, I like buying quality merchandise when it’s marked down,” says Warren Buffett. Betting big on the fallout from epoch-making events, like the fall of the Berlin Wall, is George Soros’s preferred tactic. Jim Simons, the founder of Renaissance Technologies, a hedge fund, spots patterns.Mr Simons is less famous than Mr Soros or Mr Buffett, but no less successful.
There were missteps along the way. Early in his career Mr Simons unintentionally almost cornered the market for Maine potatoes, only realising when regulators reprimanded him. For months the team struggled to make money from trading shares, until a young programmer spotted that Mr Mercer had typed a fixed value for the500 index in one of half a million lines of code, rather than getting the program to use the index’s current value.
As Mr Zuckerman lucidly explains, such strategies have limitations. One is that their scale is limited. Medallion, which trades on short-term price signals, has never held more than $10bn. The narrower the time frame, the larger the market inefficiencies and the greater the chance that an algorithm’s choice of trade will succeed. But short-termism reduces capacity. Renaissance now has funds, open to outsiders, that trade over longer horizons. But returns have been less impressive.
Other firms now try to copy Renaissance’s trades. Insiders say it tries to trade a pattern “to capacity”, moving prices so that other firms cannot spot the same signals—rather as if a bargain-hunter, upon learning that a favourite shop was holding a sale, arrived early and bought up the entire stock so that no one else even realised the sale was on.
The book’s only disappointment is that the man at the centre of it all features relatively little. That is perhaps unsurprising. Mr Simons studiously avoids publicity. After all, keeping its funds’ strategies secret is a big part of Renaissance’s success. Having solved the market, he is hardly about to give away his edge that easily.section of the print edition under the headline
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