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###### Securities and Exchange Commission

          - [Release No. 34-64228; File No. SR-CHX-2011-06]

                    Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”) [1]                                         , and Rule 19b-4 [2]                                          thereunder, notice is hereby given that on April 5, 2010, the Chicago Stock Exchange, Inc. (“CHX” or the “Exchange”) filed with the Securities and Exchange Commission (“Commission”) the proposed rule change as described in Items I and II below, which Items have been prepared by the CHX. CHX has filed this proposal pursuant to Exchange Act Rule 19b-4(f)(6) [3]                                          which is effective upon filing with the Commission.                

## I. Self-Regulatory Organization's Statement of the Terms of Substance of the Proposed Rule Change

                    CHX proposes to amend its rules to extend the pilot program relating to clearly erroneous transactions. The text of this proposed rule change is available on the Exchange's Web site at                     *(http://www.chx.com)*                     and in the Commission's Public Reference Room.                

## II. Self-Regulatory Organization's Statement of the Purpose of, and Statutory Basis for, the Proposed Rule Change

In its filing with the Commission, the CHX included statements concerning the purpose of and basis for the proposed rule changes and discussed any comments it received regarding the proposal. The text of these statements may be examined at the places specified in Item IV below. The CHX has prepared summaries, set forth in sections A, B and C below, of the most significant aspects of such statements.

### A. Self-Regulatory Organization's Statement of the Purpose of, and Statutory Basis for, the Proposed Rule Changes

#### 1. Purpose

                    In September, 2010, CHX obtained Commission approval of a filing amending its rules relating to clearly erroneous transactions on a pilot basis until December 10, 2010.[4]                                          This program was subsequently extended until April 11, 2011.[5]                                          The proposed rule change merely extends the duration of the pilot program to the earlier of August 11, 2011 or the date on which a limit up/limit down mechanism to address extraordinary market volatility, if adopted, applies. Extending the pilot in this manner will allow it to continue until the limit up/limit down mechanism to address extraordinary market volatility is adopted.                

#### 2. Statutory Basis

                    Approval of the rule change proposed in this submission is consistent with the requirements of the Act and the rules and regulations thereunder that are applicable to a national securities exchange, and, in particular, with the requirements of Section 6(b) of the Act.[6]       ( print page 20793)                        In particular, the proposed change is consistent with Section 6(b)(5) of the Act,[7]                                          because it would promote just and equitable principles of trade, remove impediments to, and perfect the mechanism of, a free and open market and a national market system, and, in general, protect investors and the public interest. The proposed rule change is also designed to support the principles of Section 11A(a)(1) [8]                                          of the Act in that it seeks to assure fair competition among brokers and dealers and among exchange markets. The Exchange believes that the proposed rule meets these requirements in that it promotes transparency and uniformity across markets concerning reviews of potentially clearly erroneous executions in various contexts, including reviews in the context of a Multi-Stock Event involving twenty or more securities and reviews resulting from a Trigger Trade and any executions occurring immediately after a Trigger Trade but before a trading pause is in effect on the Exchange. Further, the Exchange believes that the proposed changes enhance the objectivity of decisions made by the Exchange with respect to clearly erroneous executions.                

### B. Self-Regulatory Organization's Statement of Burden on Competition

The Exchange does not believe that the proposed rule change will impose any burden on competition that is not necessary or appropriate in furtherance of the purposes of the Act.

### C. Self-Regulatory Organization's Statement on Comments Regarding the Proposed Rule Changes Received From Members, Participants or Others

No written comments were either solicited or received.

## III. Date of Effectiveness of the Proposed Rule Changes and Timing for Commission Action

                    Because the foregoing proposed rule change does not: (i) Significantly affect the protection of investors or the public interest; (ii) impose any significant burden on competition; and (iii) become operative for 30 days from the date on which it was filed, or such shorter time as the Commission may designate, it has become effective pursuant to Section 19(b)(3)(A) of the Act [9]                                          and Rule 19b-4(f)(6)(iii) thereunder.[10]                                          The Exchange has asked the Commission to waive the 30-day operative delay so that the proposal may become operative immediately upon filing. The Commission believes that waiving the 30-day operative delay is consistent with the protection of investors and the public interest because such waiver will allow the pilot program to continue uninterrupted and help ensure uniformity among the national securities exchanges and FINRA with respect to the treatment of clearly erroneous transactions.[11]                                          Accordingly, the Commission waives the 30-day operative delay requirement and designates the proposed rule change as operative upon filing with the Commission.                

At any time within 60 days of the filing of the proposed rule change, the Commission summarily may temporarily suspend such rule change if it appears to the Commission that such action is necessary or appropriate in the public interest, for the protection of investors, or otherwise in furtherance of the purposes of the Act.

## IV. Solicitation of Comments

Interested persons are invited to submit written data, views, and arguments concerning the foregoing, including whether the proposed rule change is consistent with the Act. Comments may be submitted by any of the following methods:

### Electronic Comments

    - Use the Commission's Internet comment form ( http://www.sec.gov/​rules/​sro.shtml ); or                
    - Send an e-mail to rule-comments@sec.gov.                      Please include File Number SR-CHX-2011-06 on the subject line.                

### Paper Comments

    - Send paper comments in triplicate to Elizabeth M. Murphy, Secretary, Securities and Exchange Commission, 100 F Street, NE., Washington, DC 20549-1090.

                    All submissions should refer to File Number SR-CHX-2011-06. This file number should be included on the subject line if e-mail is used. To help the Commission process and review your comments more efficiently, please use only one method. The Commission will post all comments on the Commission's Internet Web site (                    *http://www.sec.gov/​rules/​sro.shtml*). Copies of the submission, all subsequent amendments, all written statements with respect to the proposed rule change that are filed with the Commission, and all written communications relating to the proposed rule change between the Commission and any person, other than those that may be withheld from the public in accordance with the provisions of 5 U.S.C. 552, will be available for Web site viewing and printing in the Commission's Public Reference Room, 100 F Street, NE., Washington, DC 20549, on official business days between the hours of 10 a.m. and 3 p.m. Copies of such filing also will be available for inspection and copying at the principal office of the Exchange. All comments received will be posted without change; the Commission does not edit personal identifying information from submissions. You should submit only information that you wish to make publicly available. All submissions should refer to File Number SR-CHX-2011-06 and should be submitted on or before May 4, 2011.                

                        For the Commission, by the Division of Trading and Markets, pursuant to delegated authority.[12] 

Cathy H. Ahn,

Deputy Secretary.

# Footnotes

1.                             15 U.S.C. 78s(b)(1).                    
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2.                             17 CFR 240.19b-4.                    
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3.                             17 CFR 240.19b-4(f)(6).                    
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4.                                                     *See*                         Securities Exchange Act Release No. 34-62886 (September 10, 2010), 75 FR 56613 September 16, 2010) approving SR-CHX-2010-13.                    
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5.                                                     *See*                         Securities Exchange Act Release No. 34-63487 (December 9, 2010), 75 FR 78279 December 15, 2010).                    
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6.                             15 U.S.C. 78f(b).                    
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7.                             15 U.S.C. 78f(b)(5).                    
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8.                             15 U.S.C. 78k-1(a)(1).                    
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9.                             15 U.S.C. 78s(b)(3)(A).                    
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10.                             17 CFR 240.19b-4(f)(6)(iii). In addition, Rule 19b-4(f)(6)(iii) requires that a self-regulatory organization submit to the Commission written notice of its intent to file the proposed rule change, along with a brief description and text of the proposed rule change, at least five business days prior to the filing of the proposed rule change, or such shorter time as designated by the Commission. The Commission notes that the Exchange has satisfied this requirement.                    
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11.                             For purposes only of waiving the 30-day operative delay, the Commission has considered the proposed rule's impact on efficiency, competition, and capital formation.                         *See*15 U.S.C. 78c(f).                    
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12.                                 17 CFR 200.30-3(a)(12).                        
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[FR Doc. 2011-8792 Filed 4-12-11; 8:45 am]

BILLING CODE 8011-01-P