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Celebrating 50 Years of OCC

April 26, 2023

On this day 50 years ago, in the Board of Trade Building in Chicago's financial district, the Chicago Board Options Exchange (CBOE) was founded as well as its wholly owned subsidiary, CBOE Clearing Corp. — the predecessor to OCC. CBOE was the first U.S. exchange to trade listed options. On opening day, trading in options on 16 stocks began, and 911 total call options contracts were traded.

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