US stocks today: Dow falls 500 points after Trump says Iran deal is 'over'

US markets ended mixed but lower overall after President Trump declared the Iran deal is over, with the Dow falling 592 points or 1.12% and the S&P 500 slipping 0.30%, while oil prices surged with Brent crude settling up 5.2% and Treasury yields rising. The geopolitical escalation threatens to derail a year-to-date S&P 500 rally of about 9%, reviving inflation concerns and complicating the Fed's policy path, with traders now pricing in a rate hike by the December meeting. The IMF also lowered its 2026 global growth forecast to 3%, warning of ongoing Middle East war risks, while travel and cruise stocks declined on higher fuel cost concerns.