The CME Group corn, soybean and wheat markets have continued pressure from a progressive corn harvest. As a result, the open outcry trading is seen sharply lower Tuesday.

The Early Calls for the commodities on Tuesday, September 18, 2012, are lower. Corn is seen opening 3-5 cents lower, soybeans 25-27 cents lower, and wheat 1-2 cents lower.

In overnight trading, the Dec. corn futures contract traded 3 cents lower at $7.45 per bushel. November soybean futures trade 27 cents lower at $16.41 per bushel, and Dec. wheat traded 3/4 of a cent lower at $8.77. For Dec. soybean meal futures, the contract traded $11.00 per short ton lower at $494.40. Dec. soybean oil futures traded $0.35 lower at $55.04.

The outside markets are unfavorable for Tuesday's grain trade. The real factors driving the calls will be the lower overnight markets.

Discuss the corn, soybean and wheat markets in Marketing Talk.