Wheat was little changed on Thursday traded near its strongest level in five weeks as freezing weather is threatening the winter crop of the world's biggest exporter, U.S., at the same time corn and soybean futures dropped 0.1% and 0.2%, respectively. May wheat futures were traded at $7.375 a bushel on CBOT following an increase to the highest level since February 21 at $7.4075 yesterday.