US copper futures ended up a shade on Wednesday, after hitting their lowest levels in nearly two weeks, as a weaker dollar offered some support to an extended downward price correction from last week's eight-month highs. COMEX estimated futures volume at 21,484 lots by 1 pm EDT (1700 GMT). Final volume on Tuesday at 27,662 lots. COMEX copper stocks rose 36 short tons to 59,523 short tons as of Tuesday.