Global stocks mostly fell Tuesday as investors weighed the recent tech rally on Wall Street against growing fears of an AI bubble and concerns over the US interest-rate outlook.

A flood of multibillion-dollar investment into artificial intelligence has been a key driver of the surge in mostly technology equities across the globe this year, sending valuations to record highs.

But there is increasing speculation that tech-led gains may have gone too far and a painful correction could be on the way.

"Wall Street CEOs have also put investors on notice for a correction in the next 1-2 years," said Kathleen Brooks, research director at trading group XTB.

"It seems like the investment community has taken heed of this message," she added.

Shares of Palantir slumped 8.0 percent despite the com

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