Base metals were mostly down on Tuesday. Copper fell 0.68 cents to close at $2.4374/lb. Nickel dropped more than 21 cents to finish at $7.1320/lb. Zinc lost three-quarters of a penny, ending at $0.7357/lb. Aluminum added less than a quarter of a cent, closing at $0.7634/lb., while lead moved to $0.7493/lb., down more than a penny from the previous session. Copper retreated a bit yesterday capping a six-day rally that pushed the red metal to a nine-month high on Monday. Speculation that demand will slacken in a seasonal slowdown in China had much to do with the drop in prices.

China imported 378,943 metric tons of refined copper last month, a 12% increase from May and the fifth straight record, customs office data showed yesterday.

“Demand should ease after builders filled orders for the summer construction peak and the margin between China and London prices narrowed,” said Pang Ying, an analyst