Self-Regulatory Organizations; Chicago Board Options Exchange, Incorporated; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Increase the Class Quoting Limit in the Option Class Accredited Home Lenders Holding (LEND)

Pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”), and Rule 19b-4 thereunder, notice is hereby given that on March 15, 2007, the Chicago Board Options Exchange, Incorporated (“CBOE” or “Exchange”) filed with the Securities and Exchange Commission (“Commission”) the proposed rule change as described in Items I, II, and III below, which Items have been substantially prepared by the CBOE. The Exchange has designated this proposal as one constituting a stated policy, practice, or interpretation with respect to the meaning, administration, or enforcement of an existing rule under Section 19(b)(3)(A)(i) of the Act, and Rule 19b-4(f)(1) thereunder, which renders the proposal effective upon filing with the Commission. 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

CBOE proposes to increase the class quoting limit in the option class Accredited Home Lenders Holding (LEND). The text of the proposed rule change is available on CBOE's Web site ( www.cboe.com ), at the CBOE's Office of the Secretary, and at 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 Exchange 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 aspects of such statements.

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

1. Purpose

CBOE Rule 8.3A, Maximum Number of Market Participants Quoting Electronically per Product, establishes class quoting limits (“CQLs”) for each class traded on the Hybrid Trading System. A CQL is the maximum number of quoters that may quote electronically in a given product and the current levels are established from 25-40, depending on the trading activity of the particular product.

Rule 8.3A, Interpretation .01(c) provides a procedure by which the President of the Exchange may increase the CQL for a particular product. In this regard, the President of the Exchange may increase the CQL in exceptional circumstances, which are defined in the rule as “* * * substantial trading volume, whether actual or expected.” The effect of an increase in the CQL is procompetitive in that it increases the number of market participants that may quote electronically in a product. The purpose of this filing is to increase the CQL in the option class LEND from its current limit of 25 to 35.

The trading volume in LEND has increased substantially recently. Increasing the CQL in LEND options will enable the Exchange to enhance the liquidity offered, thereby offering deeper and more liquid markets.

2. Statutory Basis

Accordingly, CBOE believes the proposed rule change is consistent with the Act and the rules and regulations under the Act applicable to a national securities exchange and, in particular, the requirements of Section 6(b) of the Act. Specifically, the Exchange believes the proposed rule change is consistent with the Section 6(b)(5) requirements that the rules of an exchange be designed to promote just and equitable principles of trade, to prevent fraudulent and manipulative acts and, in general, to protect investors and the public interest.

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 that is 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 received nor solicited written comments on the proposal.

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

The foregoing proposed rule change will take effect upon filing with the Commission pursuant to Section 19(b)(3)(A)(i) of the Act and Rule 19b-4(f)(1) thereunder, because it constitutes a stated policy, practice, or interpretation with respect to the meaning, administration, or enforcement of an existing rule.

At any time within 60 days of the filing of the proposed rule change, the Commission may summarily abrogate 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-CBOE-2007-29 on the subject line.

Paper Comments

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

All submissions should refer to File Number SR-CBOE-2007-29. 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 inspection and copying in the Commission's Public Reference Section, 100 F Street, NE., Washington, DC 20549-9303. Copies of such filing also will be available for inspection and copying at the principal office of the CBOE. 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-2007-29 and should be submitted on or before April 19, 2007.