US copper futures fell under the weight of currency-related selling and waning risk appetite early on Thursday, after data showed a key manufacturing index for September came in lower than expected. Copper for December delivery slipped 4.70 cents, or 1.7 percent, to $2.7720 a lb by 10:54 am EDT (1454 GMT) on the New York Mercantile Exchange's COMEX division.
Range from $2.7665 to $2.8225. COMEX estimated futures volume at 9,616 lots by 10 am, due in part to week-long holiday in China.