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Dow Drops Most Since June Amid Disappointing Earnings

U.S. stocks retreated, giving the Dow Jones Industrial Average its biggest decline since June, amid disappointing results at companies from 3M Co. to DuPont Co. and as commodities erased their gain for the year.

3M, the maker of products ranging from Scotch tapes to dental braces, and DuPont, the most valuable U.S. chemical maker, slumped at least 4.1 percent. Freeport-McMoRan Copper & Gold Inc. and Halliburton Co. dropped more than 3.1 percent as commodities sank amid concern about a global economic slowdown. Facebook Inc. surged 9.5 percent at 4:39 p.m. New York time after posting sales that topped analysts’ projections.