US copper futures closed down on Thursday as rising stock levels in London warehouses weighed on values in thinned out pre-holiday business conditions, traders said. New York commodity markets will be closed on Monday, September 1 for the US Labour Day holiday. Markets reopen on Tuesday, September 2 for normal trading hours.
Most-active copper for December delivery ended down 4.45 cents at $3.4005 a lb on the New York Mercantile Exchange's COMEX division. The session range ran from $3.3860 to $3.4685. Spot September fell 4.45 cents to close at $3.4270. COMEX estimated final futures volume at 18,253 lots, versus 25,328 lots on Wednesday.