LIVE Dow Futures Drop. Wall Street Questions AI Valuations. Last Updated: Updated 40 min ago Markets Drop as Wall Street Questions AI Valuations. Stock Futures Dive. By George Glover Stocks looked set to slide on Tuesday as investors questioned how long the blistering artificial-intelligence rally can last, despite solid earnings from data analytics software developer Palantir. Saved Articles Watchlist Newsletters Video Center Network Futures tracking the Dow Jones Industrial Average dropped 337 points, or ...