Stocks bounced back on Wednesday on strong corporate earnings and raised outlooks, while a decline in the U.S. dollar lifted shares related to materials companies. Delta Air Lines and US Airways Group jumped after they reported strong profits, while Boeing Co. buoyed the Dow after it boosted its full-year forecast. Materials shares led the broad market higher, with Freeport-McMoRan Copper & Gold gaining 2.8 percent to $95.33 and the S&P materials index .GSPM rose 2.3 percent. Commodities gained as the U.S. dollar dropped to a near 15-year low against the yen.