CBOE - Chicago Board Options Exchange

WikiPedia Entry:
"The Chicago Board Options Exchange (abbreviated CBOE, but commonly pronounced see-bo), located at 400 South LaSalle Street in Chicago, is the largest U.S. options exchange with annual trading volume that hovered around one billion contracts at the end of 2007.[1] CBOE offers options on over 2,200 companies, 22 stock indexes, and 140 exchange-traded funds (ETFs)."

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