CME: 对于标准普尔 500(S&P500) 期货合约,最终结算价格由构成指数的所有个别公司的开盘价决定
https://www.cmegroup.com/cn-s/education/learn-about-trading/courses/introduction-to-options/understanding-am-pm-expirations.html
https://www.cmegroup.com/cn-s/education/learn-about-trading/courses/introduction-to-options/understanding-am-pm-expirations.html