CHICAGO, Illinois (Agriculture.com)--The pre-opening prices for the CME Group grain commodities for Friday, July 29, 2011 are mixed. Corn is seen opening 2-4 cents lower, soybeans down 1-2 cents, and wheat 1-2 cents higher. 

In overnight electronic trading, the Dec. corn futures contract traded 5 1/2 cents lower at $6.80 3/4 per bushel. The Nov. soybean futures contract traded 1 1/4 cents lower at $13.70 per bushel. The Sep. wheat futures contract traded 3/4 of a cent higher at $6.94. For Dec. soymeal futures, the contract traded $0.18 higher at $364.00 and Dec. soyoil $0.18 higher at $56.73. 

The outside markets are not supportive for Friday's grain trade. The real factors driving the calls are the mostly mixed overnight markets.