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.

The S&P 500's best stock this year is fighting back, as it looks set to avoid suffering its worst stretch in 2 1/2-years. Palantir's stock was rallying 1.1% in recen

Citron Research, the firm led by short-seller Andrew Left, unpacked its bear case for Palantir, using OpenAI to show why it may be highly overvalued.

Two hedge fund managers with a track record for market beating returns sold Nvidia and bought Palantir in the second quarter.

Andrew Left argues that investors have overhyped Palantir stock, and its valuation pales in comparison to a true AI leader like OpenAI.

The major indexes close the day with losses on Thursday after wavering earlier in the session. Palantir stock adds suspense.

Key Takeaways Palantir shares slid Wednesday to log their sixth straight day of declines, after a short seller raised concerns about the stock's elevated valuation.Yesterday’s move lower coincided with the relative strength index falling into bearish territory,