Corn (CORN -1.8%) gives up early gains and turns sharply lower after the USDA estimates 2013/14 ending stocks of 151.8M tons, above the trade estimate of 149.6M. The USDA cut its yield projection by 1.5 bushels to 156.5 bushels/acre, but lower feed usage and no reduction in planted acreage (despite spring delays) has stocks higher. Tyson (TSN +0.9%) and Pilgrim's Pride (PPC +1.9%) cheer the news. The data was bearish for beans (SOYB -1.8%) as well. Grains ETF (JJG -1.3%).