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Rita NazarethFortune |
A risk-off week on Wall Street is drawing to a close, with some of the most-expensive areas of the market driving stocks lower.

The S&P 500 lost 2% and the Nasdaq 100 sank 3%, with the tech-heavy gauge on the brink of a technical correction.

A 1.5% slide in the S&P 500 Friday wiped out its advance in the nascent year.
