芝加哥商业交易所：10.21 金银铜成交量及未平仓数据变动

Group 1 - The core point of the article highlights the trading volume and open interest data for gold, silver, and copper futures on October 21, as reported by the Chicago Mercantile Exchange [1] Group 2 - Gold futures trading volume reached 577,546 contracts, an increase of 209,220 contracts from the previous data [1] - Open interest for gold contracts was 473,401, a decrease of 2,537 contracts from the previous data [1] - Silver futures trading volume was 171,880 contracts, an increase of 60,619 contracts from the previous data [1] - Open interest for silver contracts was 169,723, a decrease of 2,560 contracts from the previous data [1] - Copper futures trading volume was 61,583 contracts, an increase of 18,516 contracts from the previous data [1] - Open interest for copper contracts was 258,662, an increase of 2,606 contracts from the previous data [1]