Then, short seller Andrew Left of Citron Research said PLTR stock was "detached from fundamentals and analysis". He's certainly not the first one to suggest that the Palantir rally has gone too far. However,

Palantir (PLTR) shares closed in the red on Monday after Citron Research, a renowned short seller, warned the AI-enabled data analytics firm is trading at a valuation that’s super disconnected from its fundamentals.

Palantir Technologies shares have has become a focal point of market debate in recent sessions. A new short-seller report clashes with bullish catalysts from government and enterprise sectors.