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Position Limit Circulars

Option Position Limits

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DateTitle
07/22/2010 PL10-29 Adjusted Position and Exercise Limit for certain Equity Option Class will revert to a New Adjusted Position and Exercise Limit effective August 23, 2010
07/22/2010 PL10-28 Exchange Traded Fund and Equity Position and Exercise Limits will be decreased to a Lower Tier Limit Effective August 23, 2010
07/16/2010 PL10-27 Arena Resources, Inc. ("ARD") Merger COMPLETED with SandRidge Energy, Inc. ("SD")
07/08/2010 PL10-26 Adjusted Position and Exercise Limits for certain Equity Option Classes will revert to either their Applicable Standard or Adjusted Position and Exercise Limits effective July 19, 2010
07/08/2010 PL10-24 Exchange Traded Fund, HOLDRs? and Equity Position and Exercise Limits will be decreased to a Lower Tier Limit Effective July 19, 2010
07/06/2010 PL10-25 Waste Services, Inc. ("WSII") Merger COMPLETED with IESI-BFC Ltd. ("BIN")
06/28/2010 PL10-23 XTO Energy, Inc. ("XTO") Merger COMPLETED with Exxon Mobil Corporation ("XOM")
06/04/2010 PL10-22 Youbet.com, Inc. ("UBET") Merger COMPLETED with Churchill Downs Incorporated ("CHDN")
06/02/2010 PL10-21 RiskMetrics Group, Inc. ("RISK") Merger COMPLETED with MSCI Inc. Class A ("MXB")
05/28/2010 PL10-19 Adjusted Position and Exercise Limits for certain Equity Option Classes will revert to either their Applicable Standard or Adjusted Position and Exercise Limits effective June 21, 2010

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