On November 4, 2025, news broke that Michael Burry, famed for his 'Big Short' bets, has taken significant short positions against Nvidia and Palantir, directly challenging the prevailing bullish sentiment in AI stocks. This announcement comes just days after Nvidia reached a historic $5 trillion market capitalization, fueled by optimism around AI infrastructure spending and recent product launches. Nvidia's stock closed at $206.88 (+2.17%) on November 3, 2025, but is trading lower in pre-market at $203.15 (-1.80%), reflecting investor caution following Burry's move and broader market weakness in tech. The news has heightened volatility and may prompt reassessment of Nvidia's valuation and growth prospects.