_ Stop "harmony" is a good way to help others, and it is a good way to help others. Among them, CBOT is mainly the futures of agricultural products such as soybeans, corn and wheat, while COMEX is related to energy and rare metals. Investors can compare which futures market they are going to invest in according to their own varieties. NYMEX (American crude oil futures market) started trading one hour earlier in summer than in winter and ended trading two hours earlier. That is to say, the trading time of daylight saving time is: 20: 30- 02: 00 (the next day). Trading time in winter is: 2 1: 30- 4: 00 (the next day).