Copper futures (HG1:COM) rose nearly 4% on Wednesday, extending gains to a second trading session after U.S. President Donald Trump ordered an investigation into potential tariffs on copper imports. Prices also got a boost from expectations of supply disruptions after Chile was hit with a widespread power outage,

A massive power outage across Chile plunged the country's capital Santiago into darkness on Tuesday (February 25) and knocked out electricity to major copper mines in the country's north, buffeting global metal markets. Syakir Jasnee reports.

A large power outage struck most of Chile on Tuesday, resulting in a curfew until Wednesday morning for the areas hit by the blackout.