NEW YORK (AP) — An early swoon shook the U.S. stock market on Friday, as Nvidia , bitcoin, gold and other high flyers swung on an increasingly antsy Wall Street, but it quickly calmed.

After starting the day with a sharp drop of 1.3%, the S&P 500 erased all of it and then meandered up and down before finishing with a slight dip of 0.1%. The Nasdaq composite flipped to a gain of 0.1%, while the Dow Jones Industrial Average trimmed its loss to 309 points, or 0.7%, after earlier being down nearly 600.

AI stocks were again at the center of the action, a day after dragging Wall Street to one of its worst drops since its springtime sell-off. Nvidia, which has become the poster child of the frenzy around artificial-intelligence technology, began the day with a loss of 3.4%. It then stor

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