Copper Posts Biggest One-Day Gain Ever to Hit Record on Tariff Chatter

5 min ago Copper Posts Biggest One-Day Gain Ever to Hit Record on Tariff Chatter Comex copper futures soared 13.3% closing at $5.645 a pound, a record high for the front-month contract that exceeds records set in March. It's also the largest one-day percentage gain on record. The surge comes after…