If you saw a penny on the sidewalk, would you pick it up?
You may think it's not worth the effort, but a breed of investors who have been in the news do. Using super-fast computers, high-frequency traders in effect bend down to pick up pennies lying about in the stock market _ then do it again, sometimes thousands of times a second.
More than a week after the Dow Jones industrial average fell nearly 1,000 points, its biggest intraday drop ever, regulators are still sifting through buy and sell orders to figure out what sparked it. One big focus are orders placed by high-frequency traders, or HFTs, and for good reason. These quick-buck firms barely existed a few …
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