High frequency trading has official gone mainstream. From the New York Times:
"It is the hot new thing on Wall Street, a way for a handful of traders to master the stock market, peek at investors’ orders and, critics say, even subtly manipulate share prices.
It is called high-frequency trading — and it is suddenly one of the most talked-about and mysterious forces in the markets.
Nearly everyone on Wall Street is wondering how hedge funds and large banks like Goldman Sachs are making so much money so soon after the financial system nearly collapsed. High-frequency trading is one answer."
(Their activities were described by an investor at a major Wall Street firm who spoke on the condition of anonymity to protect his job.)
hat tip Nicholas