U.S. manufacturers expanded at a faster pace in February and business would have been even better if not for severe winter weather, according to an Institute for Supply Management survey of executives, MarketWatch reported. The monthly index of manufacturing activity increased to 53.2 percent, up from an eight-month low of 51.3 percent in January. Any number above 50 percent signals expansion. The index is compiled from a survey of executives who order raw materials and other supplies for their companies. Most executives said orders were increasing.