In the early days, there was only public bidding. Later, although the electronic trading system was introduced, COMEX did not cancel the public bidding, but mixed the two modes. In the early days of the market, open bidding was adopted and then broadcast by electronic trading system. Participants can trade together in COMEX for nearly 24 hours. There is a close interaction between London and new york gold exchange markets, and a swap transaction between London spot gold and new york futures gold is derived.

Within 18 hours after the trading place is closed, the energy and metal contracts of NYMEX branches and COMEX branches can be traded through the NYMEX ACCESS electronic trading system established on the Internet, so that participants from Japan, Singapore, Hong Kong, London and Switzerland can actively participate in the energy and metal futures market during normal working hours.

Price is the result of investors' game.