India, Oct. 29 -- Nasdaq futures fell on Thursday as investors became concerned about the money major technology companies are spending on artificial intelligence (AI). Mixed quarterly results from Alphabet and Microsoft led investors to question whether heavy spending on AI would generate enough returns. Investors also focused on an upcoming US inflation report, which could influence the Federal Reserve's next interest rate decision.

Alphabet shares fell 10.5% in premarket trading on Thursday after the Google parent's latest results disappointed investors. The company reported weaker-than-expected performance in its main search advertising business.

Investors were also concerned about the sharp increase in cash spending as Alphabet con...