• Is the Chicago Board Options Exchange.
• Chicago Board Options Exchange.
• Chicago Board Options Exchange. A securities exchange created in the early 1970s for the public trading of standardized option contracts.
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| ||American option: An option that may be exercised at any time up to and including the expiration date. Related: European optionAn option that may be exercised at any time during the life of the option. Stock options that trade in U.S. option exchanges, such as the Cboe, are of American types. Index options are of either American (option on S&P100 index, called OEX) or European types (option on S&P500 index, called SPX). See call and put options.|