CBOE (Chicago Board Options Exchange)

The largest options exchange in the United States and the birthplace of listed options trading, founded in 1973 as a spinoff of the Chicago Board of Trade. The CBOE is home to the VIX (Volatility Index), the most widely followed measure of market fear. Now operating as Cboe Global Markets, it runs exchanges across equities, options, futures, and foreign exchange, processing millions of contracts daily.