Friday, August 24, 2007

Cracking The Street's New Math

Algorithmic trades are sweeping the stock market. But how secure are they?

Ted Oberhaus used to have one big headache. As director of equity trading at the $93 billion Jersey City-based Lord Abbett & Co. mutual-fund group, he typically needs to buy and sell about 7 million shares a day. Trouble is, the average-size deal on the New York Stock Exchange has fallen to just 400 shares, down from 1,477 in 1998.

As a result, if other traders get wind of what Oberhaus is up to, market prices could move swiftly against him. "We're trying to put elephant-size orders through a keyhole," says Oberhaus.




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