Wheat jumped on Monday gaining for the third straight session to the strongest level in a four-month period amid concerns that global supplies may be curbed on damaged crops in Argentina caused by cold and dry weather. Wheat for December delivery advanced 0.8% to $7.1125 a bushel on the CBOT, the most since June 21, and the prices were at $7.1025 as of 12:48 p.m. Singapore time.