Mumbai, June 12 -- COMEX Copper futures jumped from a three-week low as equities surged amid hopes of US-Iran truce. The red metal currently trades up 1.86% at $6.39 per pound. MCX Copper gained 0.68% to trade at Rs 1334.40 per kg. In Asia, China's main CSI300 index rose 1.12%. Hong Kong's benchmark Hang Seng index jumped 1.93%. Japan's Nikkei average zoomed up 2.81%. European stocks saw excellent gains with major indices rallying around 2%. The US equities had their best day in two months amid a tumble in crude oil prices. S&P 500 jumped 1.8% as easing Iran tensions sparked hopes for renewed oil flows, cooler inflation, and a Fed rate pause. Copper could still witness some choppy moves amid broad demand uncertainty on global growth outlook...