DATE:

October 26, 2012.

Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”),^[1] and Rule 19b-4 thereunder,^[2] notice is hereby given that on October 15, 2012, Chicago Mercantile Exchange Inc. (“CME”) filed with the Securities and Exchange Commission (“Commission”) the proposed rule change described in Items I, II and III below, which Items have been prepared primarily by CME. CME filed the proposed rule change pursuant to Section 19(b)(3)(A) ^[3] of the Act and Rule 19b-4(f)(4)(i) ^[4] thereunder so that the proposal was effective upon filing with the Commission. The Commission is publishing this notice to solicit comments on the rule change from interested parties.

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

The text of the proposed rule change is below. Italicized text indicates additions; [bracketed] text indicates deletions.

CHICAGO MERCANTILE EXCHANGE INC. RULEBOOK

Rule 100-80203—No Change.

CME Chapter 802 Rules: Appendix 1

APPENDIX 1 ( printed page 66203)

Rule 80301-End—No change

II. Self-Regulatory Organizations Statement of the Purpose of, and Statutory Basis for, the Proposed Rule Change

In its filing with the Commission, CME included statements concerning the purpose of, and basis for, the proposed rule change and discussed any comments it received on the proposed rule change. The text of these statements may be examined at the places specified in Item IV below. CME 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 Change

CME offers clearing services for certain credit default swap index products. Currently, CME offers clearing of the Markit CDX North American Investment Grade Index Series 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19 and also offers clearing of the Markit CDX North ( printed page 66204) American High Yield Index Series 11, 12, 13, 14, 15, 16, 17, 18 and 19.

The proposed rule changes would expand CME's Markit CDX North American Investment Grade (“CDX IG”) Index product offerings by adding Series 8 to the current product set.

The proposed rule changes are immediately effective upon filing but will become operational on October 15, 2012. CME notes that it will also certify the proposed rule changes that are the subject of this filing to its primary regulator, the Commodity Futures Trading Commission (“CFTC”). The text of the CME proposed rule amendments is included above, with additions italicized and deletions in brackets.

The proposed CME rule amendments merely incorporate one additional series to CME's existing offering of broad-based Markit CDX North American Investment Grade credit default swaps. As such, the proposed amendments simply effect changes to an existing service of a registered clearing agency that (1) do not adversely affect the safeguarding of securities or funds in the custody or control of the clearing agency or for which it is responsible and (2) do not significantly affect the respective rights or obligations of the clearing agency or persons using its clearing agency services. Therefore, the proposed rule change is properly filed under Section 19(b)(3)(A) and Rule 19b-4(f)(4)(i) thereunder.

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

CME does not believe that the proposed rule change will have any impact, or impose any burden, on competition.

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

CME has not solicited, and does not intend to solicit, comments regarding this proposed rule change. CME has not received any unsolicited written comments from interested parties.

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

The foregoing proposed rule change has become effective upon filing pursuant to Section 19(b)(3)(A) ^[5] of the Act and Rule 19b-4(f)(4)(i) ^[6] thereunder because it effects a change in an existing service of a registered clearing agency that (1) does not adversely affect the safeguarding of securities or funds in the custody or control of the clearing agency or for which it is responsible and (2) does not significantly affect the respective rights or obligations of the clearing agency or persons using the service. 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 email torule-comments@sec.gov. Please include File Number SR-CME-2012-40 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-CME-2012-40. This file number should be included on the subject line if email 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 10:00 a.m. and 3:00 p.m. Copies of such filing also will be available for inspection and copying at the principal office of CME and on CME's Web site at http://www.cmegroup.com/​market-regulation/​files/​sec_​19b-4_​12-40.pdf.

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 available publicly. All submissions should refer to File Number SR-CME-2012-40 and should be submitted on or before November 23, 2012.