Oil prices shot higher Wednesday on concerns of an extended blockade of the Strait of Hormuz, while Wall Street stocks mostly slid as investors awaited a US Fed rate decision and a slew of tech firm earnings. Both main oil contracts jumped nearly six per cent after President Donald Trump warned Tehran on Wednesday that it should “get smart soon” and capitulate to Washington’s demands for tight controls on its nuclear programme, as a US naval blockade turned the screws on Iran’s economy. Meanw...