The red-hot trade backing artificial intelligence-related stocks has taken a bruising from a disappointing report from Oracle ( ORCL-N ), reigniting concerns about frothy valuations and an AI bubble.

Still, investors say reasons for optimism about AI remain intact, and many are wary about calling a top.

Investors have piled into AI-related companies this year as the technology has taken off, with promises to make Corporate America more efficient. Still, some investors feel AI-related shares are overvalued.

High-profile names such as Michael Burry have been bearish, comparing the recent AI boom to the 1990s dot-com era. Still, short-selling has been limited to smaller companies, with few pressing bearish bets against the biggest AI names.

The latest concerns centered on Oracle. Its sh

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