Global funds are increasing holdings of a basket of metals. Copper supply and demand fundamentals haven't changed.
China's copper consumption could be healthier than expected.
Copper rose because traders are expecting consumption to increase after the week-long holiday.
There is speculation that as much as 15,000 tons of copper from Chile and Japan arrived on Monday in Shanghai. Increased supply hasn't been able to cool cash prices, which indicates strong buying on the spot market.
Processors need to buy copper and have it delivered now to avoid additional transport charges during the holiday.