Minneapolis Grain Exchange (MGEX) Since its inception in 1881, MGEX has been the principal market for Hard Red Spring Wheat (HRSW) – first as a cash market, then futures and options. Known for its stable and reliable trading environment, MGEX has a reputation as a good place to do business. It offers the liquidity, the product line and the oversight to ensure fair and accurate trading for all its participants. MGEX offers index-based contracts. Index futures and options contracts are offered on hard red spring wheat (HRSI), hard red winter wheat (HRWI), soft red winter wheat (SRWI), corn (NCI) and soybeans (NSI).