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C2 All-Electronic Options Exchange Joins The Options Clearing Corporation

CHICAGO (November 1, 2010) The Options Clearing Corporation (OCC) and CBOE Holdings, Inc. (NASDAQ: CBOE) announced today that C2 Options Exchange, IncorporatedSM (C2SM) has become an OCC participant exchange. C2 began operations on Friday, October 29.

The addition of C2 as CBOE Holdings' new all-electronic options alternative now brings the total number of options markets in the U.S. to nine.

"We are excited to launch C2, our all-electronic alternative for options," CBOE Holdings, Inc. Chairman and CEO William J. Brodsky, said. "C2 emphasizes speed, simplicity, and a different and competitive fee schedule, and aims to attract an even broader customer base. As we grow this new venture, we look forward to continuing what has been an excellent working relationship with the OCC."

Wayne P. Luthringshausen, OCC Chairman and CEO, said, "We would like to extend a warm welcome to the newest options market, C2. As a participant exchange, C2 joins the eight other options markets to share in the benefits afforded through OCC's central counterparty clearing and settlement services."

OCC operates under the jurisdiction of the SEC and the Commodity Futures Trading Commission, and clears and guarantees the trades executed on all U.S. options exchanges. As a result of C2's affiliation with OCC, the standardized options contracts traded on C2 can be offset against the same options contracts traded on the other U.S. options markets, resulting in significant efficiencies for participating member firms.

About OCC

OCC is the world's largest derivatives clearing organization by contract volume and open interest. Founded in 1973, OCC operates under the jurisdiction of both the Securities and Exchange Commission (SEC) as a Registered Clearing Agency and the Commodity Futures Trading Commission (CFTC) as a Derivatives Clearing Organization. OCC now provides central counterparty (CCP) clearing and settlement services to 14 exchanges and platforms for options, financial and commodity futures, security futures and securities lending transactions.

As the CCP clearinghouse for the markets it serves, OCC assumes the counterparty risk of members involved in a trade-becoming the buyer to every seller and the seller to every buyer. OCC manages its risk of member default by collecting margin (collateral). Clearing member margin requirements are calculated using OCC's proprietary System for Theoretical Analysis and Numerical Simulations (STANS) that uses large-scale Monte Carlo simulations to forecast price moves and correlations to make those margin determinations. In 1993, OCC became the first clearinghouse to receive a 'AAA' credit rating from Standard & Poor's Corporation, and has continued to receive that high rating every year as a result of its risk management standards.

OCC operates as a utility clearinghouse, owned by several of its participant exchanges but with a Board of Directors majority drawn from its clearing members, allowing it to provide highly efficient but low-cost solutions to the markets it serves. More information about OCC is available through its Web site at www.optionsclearing.com.

About CBOE Holdings, Inc.

CBOE Holdings, Inc. is the holding company for Chicago Board Options Exchange (CBOE), C2 Options Exchange, Incorporated, 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's Hybrid Trading System incorporates electronic and open-outcry trading, enabling customers to choose their trading method. CBOE's Hybrid is powered by CBOEdirect, a proprietary, state-of-the-art electronic platform that also supports the CBOE Futures Exchange (CFE), CBOE Stock Exchange (CBSX) and OneChicago. 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 AAA-rated Options Clearing Corporation (OCC).

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CBOE®, Chicago Board Options Exchange®, CBSX®, CBOE Stock Exchange®, CFE®, CBOEdirect®, FLEX®, Hybrid®, CBOE Volatility Index® and VIX® are registered trademarks, and BuyWriteSM, CBSXSM, CBOE Futures ExchangeSM, C2 Options Exchange, IncorporatedSM and C2SM are servicemarks of Chicago Board Options Exchange, Incorporated. Standard & Poor's®, S&P®, S&P 100®, S&P 500®, Standard and Poor's Depositary Receipts®, and SPDR® are registered trademarks of The McGraw-Hill Companies, Inc. and have been licensed for use by Chicago Board Options Exchange, Incorporated.