Mumbai, April 22 -- COMEX Copper saw excellent gains amid feeble undertone in the US dollar and hit near three-week high as metals rallied. The counter currently trades at $4.80 per pound, up 1.66% on the day. Mixed equities did not cap Copper as the US dollar index stayed glued to three-year lows around 98 mark. In Asia, China's Shanghai Composite Index rose 0.3% and Hong Kong's Hang Seng Index added 0.8% amid hopes policymakers will unveil more stimulus. Japanese Nikkei 225 Index dipped 0.2% though. European stocks saw muted action today. The US stocks saw substantial losses in last session as tariff worries stayed in place. The Nasdaq slumped 2.6%, the Dow tumbled 2.5% and the S&P 500 lost 2.4%. On the MCX, Copper futures are up 0.79% at...