Since the start of the Iran war, US market sentiments have swung wildly, with a start to the earnings reporting season for big US companies helping to support stocks. Oil prices climbed more than 5 per cent and Wall Street veered towards losses before the opening bell on Monday (Apr 20) as a standoff between Iran and the US prevented tankers from using the Strait of Hormuz. Futures for the S&P 500 also fell 0.5 per cent, while futures for the Dow Jones Industrial Average slid 0.6 per cent.