Stock Market Today: Dow, S&P 500 Close Mixed As Critical Iran Deadline Nears (Live Coverage) Investor's Business DailyS&P 500 ekes out a gain Tuesday, rebounding as traders hope for last-minute Iran deal: Live updates CNBCStock market today: Dow, S&P 500, Nasdaq slide as Trump's Iran deadline looms Yahoo FinanceBrent settles down on economic worries, US crude up ahead of Trump deadline for Iran Reuters