The ticker symbol used to identify index options traded on the Standard & Poor's 100 index. OEX options are listed with a letter code indicating the month code for puts and calls, and a letter code indicating the strike price. Strike prices greater than five points use three letters to indicate which group of 100 the option is trading for.


For example, a February Call 480 would be written as OXB BP, which can also be written as OXBBP or OXB=BP. The S&P 100 is a market-capitalization weighted index of 100 stocks from a broad range of industries.

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