Stock futures are little changed after Trump ultimatum to Iran; Wall Street tries to snap 4-week slide: Live updates CNBCStock Futures Are Falling, Oil Rising as Iran Tensions Grow Barron'sDow Jones Futures, Oil Prices Shrug Off Trump Threats To 'Obliterate' Iran's Power Plants Investor's Business DailyOil Edges Lower as Traders Eye Trump's Deadline to Reopen Strait of Hormuz WSJ