Mumbai, Feb. 3 -- COMEX copper is edging higher on Tuesday morning in Asia tracking strength in Wall Street overnight although firmness in dollar is likely to cap upside in the red metal. The strength on Wall Street came following the release of a report from the Institute for Supply Management showing manufacturing activity in the U.S. unexpectedly expanded for the first time in 12 months in January. Stocks also benefitted from signs of de-escalating tensions between the U.S. and Iran amid reports Iran is prepared to negotiate with the U.S. over its nuclear program. The Dow jumped 515.19 points or 1.1 percent to 49,407.66, the Nasdaq climbed 130.29 points or 0.6 percent to 23,592.11 and the S&P 500 rose 37.41 points or 0.5 percent to 6,976...