Palantir Technologies was the worst performer in the S&P 500 on Tuesday, with the stock continuing to surrender gains following a blowout earnings report earlier this month.

Palantir stock fell for the sixth straight session on Wednesday. With the retreat, Palantir stock is down 18% from its all-time high.

Palantir's price-to-sales ratio of 114 is way above OpenAI's 17. Palantir's success in defense work could block access to growth as enterprise AI payoff remains elusive

The sudden reversal shows how the hottest AI trade and top-performing stock of the year is colliding with a broader market rotation out of big tech.

Software stocks have been under pressure—and there may be more selling to come as highflying shares of Palantir finally succumb to gravity.

The heaviest weight on the market was Nvidia, whose chips are powering much of the move into AI. It sank 3.5%.

Wall Street continues to drift while news of a leadership change at Target took some of the spotlight away from the latest batch of corporate earnings reports. Wall Street continues to drift Wednesday while news of a leadership change at Target took some of the spotlight away from the latest batch of corporate earnings reports.

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