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Santoli: Facebook’s tumble is reminiscent of ‘Marlboro Friday’ in 1993. Here’s what we can learn from it

A trader works on the floor of the New York Stock Exchange.
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This is the daily notebook of Mike Santoli, CNBC's senior markets commentator, with ideas about trends, stocks and market statistics.

  • A stiff test for the market's rebound, coming at an interesting spot. The S&P 500 rebounded a speedy 8% from the Jan. 24 correction low and rose right up to the lower end of an old congestion zone in the 4,600s.

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