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 stormed back

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