芝加哥期权交易所 (Cboe) 重振标准普尔 500 指数二元期权，追逐由 Polymarket、Kalshi 所普及的市场

One of the largest U.S. derivatives exchanges is bringing back yes/no bets on the S&P 500 after pulling them a decade ago, moving onto turf that Polymarket and Kalshi turned into one of the internet's fastest-growing corners.