Palantir Technologies has created one of the most dramatic stories on Wall Street this year, defying conventional investment narratives. In 2025, it became the top-performing stock in the S&P 500, surging over 106% and at points climbing 144% from the start of the year—outpacing even AI heavyweights like Nvidia.

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.

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.

Palantir shares have fallen around 15% across the last five days of trading, completely erasing gains made near the start of the month.

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