Markets Drop as Wall Street Questions AI Valuations. Stock Futures Dive.

Market Overview - Dow futures dropped by 337 points, or 0.7%, while S&P 500 futures fell by 1.0% and Nasdaq 100 contracts tumbled by 1.3% [2] AI Sector Performance - Despite solid earnings from Palantir, which exceeded Wall Street's earnings and revenue targets for Q3, investors are questioning the sustainability of the AI rally [3] - Palantir's stock has surged 173% this year, leading to a valuation of over 300 times future earnings, indicating high investor expectations [3]