NEW YORK — Most U.S. stocks are rising on Thursday, but a sell-off for Oracle is weighing on Wall Street as investors question whether its big spending on artificial-intelligence technology will pay off.

The S&P 500 slipped 0.2% and pulled further from its all-time high, which was set in October. Drops for AI-related stocks dragged the Nasdaq composite down 0.7%, while the Dow Jones Industrial Average was doing much better with a gain of 420 points, or 0.9%, as of 10:30 a.m. Eastern time.

Oracle tumbled 12.7% and at one point in the morning was on track for its worst day since 2001, when the dot-com bubble was still deflating. Its 14% growth in revenue for the latest quarter came up just short of analysts’ expectations even though it reported a better profit than analysts expected.

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