METALS-Copper climbs for second day as metals seek to claw back ground

Copper prices in London and Shanghai extended gains for a second day on Tuesday, with investors lured to buy low after a trade war-fuelled sell-off last week. The United States on Friday slapped tariffs on $34 billion of goods from top metals consumer China, which responded in kind. Fears that the trade spat could dampen demand for industrial metals had weighed on copper prices. "It's already maybe a bit oversold,"