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.

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

Shares of Palantir (PLTR) dropped over 9% on Tuesday due to a critical report from short-selling firm Citron Research, which cited that PLTR stock

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'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

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Nvidia, Palantir and other superstar stocks that surged in the mania surrounding artificial-intelligence technology are dragging Wall Street lower again on Wednesday. The S&P 500 fell 0.9% and was on track for a fourth straight loss after setting an all-time high last week.

NEW YORK — Wall Street faded on Tuesday following drops for Nvidia and other stars that have been riding the mania surrounding artificial-intelligence technology. The S&P 500 fell 0.6% for a third straight loss The heaviest weight on the market was Nvidia,

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