The week of April 13–17 had one master narrative: the US-Iran conflict and every twist, rumor, and diplomatic signal that came with it. Markets opened Monday to the shock of collapsed peace talks and a US naval blockade of the Strait of Hormuz — then spent the rest of the week repricing as optimism slowly clawed its way back. By Friday, Iran had declared the strait open for commercial shipping, the S&P 500 was printing fresh all-time highs, and the dollar had surrendered the week's gains to close as the worst-performing major currency. Here's a breakdown of how each major currency navigated the geopolitical noise, the data surprises, and the sentiment swings that defined one of 2026's most eventful trading weeks.