--Comex December copper recently trades up 2.1 cents, or 0.6%, at $3.4625 a pound --Traders watching Chinese economic data, leadership transition for demand cues --Copper shows little reaction to ECB news; futures settled at 11-week low Wednesday NEW YORK--Copper futures rebounded Thursday from the previous day's 11-week low as traders watched China's leadership transition for signs of shifting economic policy in the world's top metals ...

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