U.S. stock indexes ended mixed after Nvidia, Palantir and other superstar stocks pared most of their steep losses from the morning.

Nvidia, Palantir and other superstar AI stocks are dragging Wall Street lower again. The S&P 500 fell 0.5% Wednesday and was on track for a fourth straight loss after setting

Nvidia, Palantir and other superstar AI stocks are under pressure again and dragging Wall Street lower. NEW YORK (AP) — Nvidia, Palantir and other superstar stocks that surged in the mania surrounding artificial-intelligence technology are dragging Wall Street lower again on Wednesday.