Is It Time to Buy Commodities? With prices sharply down on many commodities—and stocks at record highs—investors may be wondering: Is it time to swap stocks for soybeans? We investigate. August 2, 2013, 7:51 p.m. ET By JOE LIGHT, DAN STRUMPF, ALEXANDRA WEXLER, TATYANA SHUMSKY, LESLIE JOSEPHS Commodities investors are missing out on the party. Since its recent peak…