US Stock Market Loses Over $805 Billion in Single Day

The U.S. stock market shed more than $805 billion in market capitalization in a single trading session on March 6, 2026. The massive sell-off reflects deep investor anxiety amid the ongoing Iran-Israel-U.S. military conflict and broader geopolitical uncertainty. The scale of the losses ranks among the largest single-day wipeouts in recent market history. No single sector was spared as the broad decline swept across Wall Street.