Comments on Rulemaking Petition: National Market System Plan to Address Extraordinary Market Volatility by BATS Exchange, Inc., BATS Y-Exchange, Inc., Chicago Board Options Exchange, Incorporated, Chicago Stock Exchange, Inc., EDGA Exchange, Inc., EDGX Exchange, Inc., Financial Industry Regulatory Authority, Inc., NASDAQ OMX BX, Inc., NASDAQ OMX PHLX LLC, The Nasdaq Stock Market LLC, National Stock Exchange, Inc., New York Stock Exchange LLC, NYSE Amex LLC, and NYSE Arca, Inc.

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Date Received
Date Letter Type Commenter Name
Public Comment Robert Books, Chair, Operating Committee of the LULD Plan
Public Comment Ellen Greene, Managing Director, Equities & Options Market Structure, SIFMA and Kevin Ehrlich, Managing Director, SIFMA AMG
Meeting with SEC Officials Memorandum from the Division of Trading and Markets regarding a March 21, 2024, meeting with the participants and members of the Advisory Committee of the Limit-Up Limit-Down Plan
Public Comment Kenneth Fang, Associate General Counsel, Investment Company Institute and Kevin Ercoline, Assistant General Counsel, Investment Company Institute
Public Comment Samara Cohen, Chief Investment Officer of ETF and Index Investments, BlackRock, Inc., et al.
Public Comment Alex Kuchta
Public Comment Anonymous
Public Comment Joe Edwards
Public Comment Rax Nahali
Public Comment Rene Wright
Public Comment Subhra Mazumdar
Public Comment Hope M. Jarkowski, General Counsel, New York Stock Exchange
Public Comment Elizabeth K. KIng, Chief Regulatory Officer, ICE, General Counsel and Corporate Secretary, NYSE; NYSE Group, Inc.
Public Comment Samara Cohen, Head of Global Markets, Blackrock, et al.
Public Comment Susan Olsen, General Counsel, ICI; John Ramsay, Chief Market Policy Officer, IEX; and T.R. Lazo, Managing Director and Associate General Counsel, SIFMA
Public Comment Theodore R. Lazo, Managing Director and Associate General Counsel, SIFMA
Public Comment Elizabeth King, General Counsel, New York Stock Exchange
Public Comment Elizabeth King, General Counsel, New York Stock Exchange
Staff Study Division of Economic and Risk Analysis White Paper: "Limit Up-Limit Down" Pilot Plan and Extraordinary Transitory Volatility"
Staff Study Division of Economic and Risk Analysis White Paper: "The Effect of Amendment 10 of the 'Limit Up-Limit Down' Pilot Plan"
Staff Study Memorandum from the Division of Economic and Risk Analysis regarding Cornerstone Analysis of Long-Lasting Straddle States
Staff Study Memorandum from the Division of Economic and Risk Analysis regarding Cornerstone Analysis of Trading and Market Quality Metrics on August 24, 2015
Public Comment Elizabeth King, General Counsel, New York Stock Exchange
Public Comment Elizabeth King, General Counsel, New York Stock Exchange
Staff Study Division of Economic and Risk Analysis White Paper: "Limit Up-Limit Down" Pilot Plan and Associated Events
Public Comment Mortimer J. Buckley, Chief Investment Officer, Vanguard
Public Comment David W. Blass, General Counsel, Investment Company Institute
Staff Study Division of Economic and Risk Analysis White Paper: The Determinants of ETF Trading Pauses on August 24th, 2015
Public Comment Paul Roland, Nasdaq, Inc.
Staff Study Memorandum from the Division of Economic and Risk Analysis regarding Cornerstone Analysis of the Impact of Straddle States on Options Market Quality

Last Reviewed or Updated: Dec. 18, 2025

File Number
4-631
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