Comments on C2 Rulemaking

Order Instituting Proceedings to Determine Whether to Disapprove Proposed Rule Changes Relating to Trading Halts Due to Extraordinary Market Volatility; Notice of Filing of Proposed Rule Change Related to Market-Wide Circuit Breakers

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Date Received
Date Letter Type Release Number Commenter Name
Public Comment 34-66065 Ann L. Vlcek, Managing Director and Associate General Counsel, Securities Industry and Financial Markets Association
Public Comment 34-66065 Craig S. Donohue, Chief Executive Officer, CME Group Inc.
Public Comment 34-66065 Timothy Quast, Managing Director, ModernIR
Public Comment 34-65437, 34-65428, 34-65429, 34-65433, 34-65438, 34-65426, 34-65431, 34-65440, 34-65430, 34-65425, 34-65435, 34-65436, 34-65427, 34-65436, 34-65439, 34-65434 Ann L. Vlcek, Managing Director and Associate General Counsel, Securities Industry and Financial Markets Association
Public Comment 34-65437, 34-65428, 34-65429, 34-65433, 34-65438, 34-65426, 34-65431, 34-65440, 34-65430, 34-65425, 34-65435, 34-65436, 34-65427, 34-65436, 34-65439, 34-65434 Craig S. Donohue, Chief Executive Officer, CME Group Inc.
Public Comment 34-65437, 34-65428, 34-65429, 34-65433, 34-65438, 34-65426, 34-65431, 34-65440, 34-65430, 34-65425, 34-65435, 34-65436, 34-65427, 34-65436, 34-65439, 34-65434 James J. Angel, Ph.D., CFA, Associate Professor of Finance, Georgetown University, Washington, D.C.
Public Comment 34-65437, 34-65428, 34-65429, 34-65433, 34-65438, 34-65426, 34-65431, 34-65440, 34-65430, 34-65425, 34-65435, 34-65436, 34-65427, 34-65436, 34-65439, 34-65434 Richard H. Baker, President and CEO, Managed Funds Association

Last Reviewed or Updated: Jan. 12, 2026

File Number
SR-C2-2011-024
Release Number
34-66065
34-65433
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