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.

Wall Street faded on Tuesday following drops for Nvidia and other stars that have been riding the mania surrounding artificial-intelligence technology.

Nvidia, Palantir and other superstar stocks that had surged in the mania surrounding artificial-intelligence technology are dragging Wall Street lower again on Wednesday. The S&P 500 fell 0.5% and was heading for a fourth straight loss after setting an all-time high last week.