165438+1October 9th. Soybean is one of the main crops in North America, and the harvest season is usually from September to about 65438+ 10. Farmers need to sell and trade soybeans after harvesting them. In order to facilitate the transactions between farmers and traders, the Chicago Board of Trade has designed a standardized contract for soybean futures, which is listed and traded on165438+10.9 every year.