Big Tech is spending trillions on AI. Investors now want proof it will pay off.

Big Tech is spending trillions on AI. Investors now want proof it will pay off.
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This week's selloff in technology stocks underscores a gnawing anxiety among investors: whether Big Tech's massive spending on artificial intelligence will ultimately pay off.The Nasdaq Composite Index has slipped nearly 5% this week as Wall Street frets over whether the trillions of dollars goin...