By Arsheeya Bajwa and Stephen Nellis

(Reuters) -Nvidia forecast fourth-quarter revenue above Wall Street estimates on Wednesday, betting on booming demand for its AI chips from cloud providers against the backdrop of widespread concerns of an artificial-intelligence bubble.

The results from the AI chip leader mark a defining moment for Wall Street, as global markets look to the chip designer to determine whether investing billions of dollars in AI infrastructure expansion has resulted in towering valuations that potentially outpace fundamentals.

The world’s most valuable company said it expected fiscal fourth-quarter sales of $65 billion, plus or minus 2%, compared with analysts’ average estimate of $61.66 billion, according to data compiled by LSEG.

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