About CBOE HoldingsCBOE Holdings, Inc. is the holding company for Chicago Board Options Exchange (CBOE), C2 Options Exchange and other subsidiaries. CBOE, the largest U.S. options exchange and creator of listed options, continues to set the bar for options trading through product innovation, trading technology and investor education. CBOE offers equity, index and ETF options, including proprietary products, such as S&P 500 options (SPX), the most active U.S. index option, and options on the CBOE Volatility Index (VIX). Other products engineered by CBOE include equity options, security index options, LEAPS options, FLEX options, and benchmark products such as the CBOE S&P 500 BuyWrite Index (BXM). CBOE is home to the world-renowned Options Institute and www.cboe.com, named "Best of the Web" for options information and education. CBOE is regulated by the Securities and Exchange Commission (SEC), with all trades cleared by the OCC. Forward-Looking Statements Certain information contained in this news release may constitute forward-looking statements, such as statements relating to projected amount of repurchased stock. We wish to caution readers not to place undue reliance on any forward-looking statements, which speak only as of the date made. CBOE-F CBOE®, Chicago Board Options Exchange®, CBOE Volatility Index®, FLEX®, Hybrid®, LEAPS® and VIX® are registered trademarks, and BuyWrite, BXM(SM), SPX(SM) and The Options Institute(SM) are service marks of Chicago Board Options Exchange, Incorporated (CBOE). C2(SM), C2 Options Exchange(SM) and SPXpm(SM) are service marks of C2 Options Exchange, Incorporated (C2). Standard & Poor's®, S&P® and S&P 500® are registered trademarks of Standard & Poor's Financial Services, LLC and have been licensed for use by CBOE and C2. SOURCE CBOE Holdings, Inc.