Comex copper prices tumbled to a mid-December low after investors moved to the sidelines ahead of a critical US central bank meeting.
Copper for May settlement on the Comex division of the New York Mercantile Exchange tumbled 3.30 cents or 1.1% to $3.0490 per lb. Earlier, the contract touched $3.0290, the lowest since December 13. The red metal is now on...