Notice Rule

Notice of Filing Proposed Rule Change To Revise the Current Methodology for Determining When To Halt Trading in All Stocks Due To Extraordinary Market Volatility

National Securities Exchanges, Chicago Stock Exchange, Inc. (CHX)

Public Comments

Title
Notice of Designation of Longer Period for Commission Action on Proceedings To Determine Whether To Disapprove Proposed Rule Changes Relating to Trading Halts Due to Extraordinary Market Volatility

Last Reviewed or Updated: Sept. 28, 2011