Mumbai, Sept. 11 -- COMEX copper is holding around $4.6 per pound mark on Thursday morning in Asia, near a one-week high, supported by weakening greenback and positive cues from equities. The S&P 500 and the Nasdaq pulled back well off their best levels but still managed to end the day at new record closing highs. The S&P 500 rose 19.43 points or 0.3 percent to 6,532.04 and the tech-heavy Nasdaq inched up 6.57 points or less than a tenth of a percent to 21,886.06. The Labor Department said its producer price index for final demand edged down by 0.1 percent in August after climbing by a downwardly revised 0.7 percent in July, weighing on the dollar. The Labor Department's report on consumer price inflation is likely to be in focus on Thursda...