By STAN CHOE, Associated Press Business Writer

NEW YORK (AP) — Nvidia , bitcoin and others among Wall Street’s highest flyers are falling more toward Earth on Friday, and the U.S. stock market is heading for a second straight sharp loss .

The S&P 500 sank 1.2%, coming off one of its worst days since its springtime sell-off and a global wipeout for stocks. Critics had been warning that such drops could be possible because of how high stock prices had shot since April, leaving them looking too expensive. They pointed in particular to stocks swept up in the mania around artificial-intelligence technology.

But even with its recent drops, and the S&P 500 on track for a second straight weekly loss, the index that dictates the movements for many 401(k) accounts is still within 3.3% o

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