Investors are growing nervous about the huge spending bills that tech giants are amassing to pay for their bets on artificial intelligence.

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The Nasdaq and the S&P 500 had their worst day since June as investors worried about spending on A.I. infrastructure.

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Amazon became the latest tech company to announce swelling investments in A.I. amid stumbling share prices.

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Wall Street banks and chipmakers are among those poised to capitalize on the artificial intelligence giant’s public trading debut.

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Investors are bracing for a one-two punch: rising oil prices and concerns about the soaring costs of the artificial intelligence buildout.

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