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

Long a Wall Street favorite, Nvidia has not outperformed the broader market recently, falling 3% over the last six months, worse than the S&P 500’s 7% return.