Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (the “Act”) ^[1] and Rule 19b-4 thereunder,^[2] notice is hereby given that on December 14, 2010, the Chicago Board Options Exchange, Incorporated (“Exchange” or “CBOE”) filed with the Securities and Exchange Commission (the “Commission”) the proposed rule change as described in Items I and II below, which Items have been prepared by the Exchange. The Commission is publishing this notice to solicit comments on the proposed rule change from interested persons.

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

The Exchange proposes to modify how odd-lot orders are handled on the CBOE Stock Exchange (“CBSX”). The text of the proposed rule change is available on the Exchange's Web site ( http://www.cboe.org/​Legal), at the Exchange's principal office, and on the Commission's Web site at http://www.sec.gov/​rules/​sro.shtml.

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 self-regulatory organization 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. The Exchange has prepared summaries, set forth in sections A, B, and C below, of the most significant parts of such statements.

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

1. Purpose

Currently, CBSX handles and executes round lot orders differently from the manner in which it handles and executes odd lot and mixed lot orders.^[3] If CBSX is not displaying the NBBO and step-up is not achieved pursuant to the CBSX flash process in Rule 52.6, the round lot order is then routed to the exchange displaying the NBBO for execution. Odd lot orders, however, currently are not routed to the exchange displaying the NBBO for execution. The proposed change will ensure that odd and mixed lot orders will be handled and executed in a more consistent manner with round lot orders.

Under the proposed rule change, Odd-Lot orders will be matched by the CBSX System against interest at the best price in the CBSX Book. Odd-Lot orders (or the odd-lot portion of a mixed lot order) that are not marketable will be maintained in the System so that they may trade against later submitted orders (they will be traded using CBSX's matching rules). Marketable Odd-lot orders will be handled similar to round lot orders. If fulfilling an Odd-Lot order would result in an impermissible trade-through of another exchange, the order will be routed to other exchanges to be filled at prices better than the CBSX disseminated price. If an execution is not attained at the away exchange(s), the returned order is eligible for execution on CBSX. We note that the flash process utilized by CBSX prior to routing away orders will not be employed for Odd-lot orders.

If an incoming Odd-lot order trades against a quote in the CBSX Book, the new quantity remaining in the quote will be rounded down to the nearest lower round-lot amount (zero or multiple of 100) for display purposes, with the remaining Odd-Lot amount being cancelled. If an incoming order trades against a limit order resting on the CBSX Book and an Odd-Lot amount remains from the limit order resting on the CBSX Book, that Odd-Lot amount will remain in the system eligible for execution but will not be displayed.

2. Statutory Basis

The Exchange believes the proposed rule change is consistent with the Securities Exchange Act of 1934 (the “Act”) ^[4] and the rules and regulations thereunder and, in particular, the requirements of Section 6(b) of the Act.^[5] Specifically, the Exchange believes the ( printed page 80873) proposed rule change is consistent with the Section 6(b)(5) ^[6] requirements that the rules of an exchange be designed to promote just and equitable principles of trade, to prevent fraudulent and manipulative acts, to remove impediments to and to perfect the mechanism for a free and open market and a national market system, and, in general, to protect investors and the public interest. Handling odd and mixed lot orders in the same manner as round lot orders allows CBSX to simplify the handling of odd-lot orders to the benefit of investors.

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

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

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

The Exchange neither solicited nor received comments on the proposal.

III. Date of Effectiveness of the Proposed Rule Change 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 ^[7] and Rule 19b-4(f)(6) thereunder.^[8]

The Exchange has requested that the Commission waive the 30-day operative delay. Waiver of the 30-day operative delay would allow CBSX to immediately begin processing odd-lot orders and mixed-lot orders in a manner similar to its processing of round-lot orders. The Commission believes that waiving the 30-day operative delay is consistent with the protection of investors and the public interest and designates the proposal operative upon filing.^[9]

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 torule-comments@sec.gov. Please include File Number SR-CBOE-2010-115 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-CBOE-2010-115. 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, on official business days between the hours of 10 a.m. and 3 p.m. Copies of the 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 available publicly. All submissions should refer to File Number SR-CBOE-2010-115 and should be submitted on or before January 13, 2011.