Artificial intelligence-linked shares fell on Tuesday, in lead-up to AI bellwether Nvidia's quarterly earnings, which could offer clarity on demand and justify the sector's lofty valuations.

Nvidia has led the artificial intelligence boom to become one of the stock market’s biggest companies, as tech giants continue to spend heavily on the company’s chips and data centers needed to train and operate their AI systems.

Nvidia Corp.’s stock still looks good to many Wall Street analysts ahead of the artificial-intelligence chip maker’s earnings Wednesday, even though the company isn’t expected to report the same level of revenue beat as it has done in the past few quarters.