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It is a time of superlatives in the tech industry, with historic profits, stock prices and deal prices. It’s enough to make some people very nervous.
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A sharp reversal in Asian and European stocks, after a rally fueled by Nvidia’s strong earnings, underscores how fears of an A.I. bubble are driving broad market swings.
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Growing jitters over the Federal Reserve, crypto and the future of the artificial intelligence boom have helped drive a global sell-off.
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Plus, your Friday news quiz.
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Election defeats earlier this month and the approach of 2026 have G.O.P. lawmakers cautiously asserting themselves.