For Day Traders, An Hour Is Long Term

These investors go for quick in-and-out gains--and lots of them

Three months ago, Michael Corcione kissed the corporate world goodbye and quit his job as a product manager at real-time financial-data provider Standard & Poor's ComStock Inc. It wasn't a decision he made lightly. "I have two kids under 2 years old, I own a home that's not fully paid for, and my wife doesn't work," says Corcione, 29. But he's so convinced of the growth potential in his new field that he decided the risk was worth it.

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