Jefferies Group, Inc. (the "Company") (NYSE: JEF) today announced the exercise in full of the underwriters' over-allotment option to purchase an additional $45 million of the Company’s 3.875% convertible senior debentures. The Company recently announced the sale of $300 million aggregate principal amount of its 3.875% convertible senior debentures.

This announcement does not constitute an offer to sell or the solicitation of an offer to buy the debentures or any other securities, nor will there be any sale of debentures or any other securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

The Company has filed a registration statement (including a Prospectus dated October 20, 2009, which has been supplemented by a Preliminary Prospectus Supplement dated October 20, 2009) with the Securities and Exchange Commission for the offering to which this communication relates. Before you invest, you should read the prospectus supplement and accompanying base prospectus along with other documents that the Company has filed with the Securities and Exchange Commission for more complete information about the Company and this offering. You may obtain these documents for free by visiting EDGAR on the Securities and Exchange Commission website at www.sec.gov. Alternatively, copies may be obtained from Jefferies & Company, Inc., Attention: Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022 or at (888) 449-2342.

About Jefferies

Jefferies, an independent, full-service global securities and investment banking firm, has served companies and their investors for more than 45 years. Headquartered in New York City, with offices in more than 25 cities around the world, Jefferies provides clients with capital markets and financial advisory services, institutional brokerage, securities research and asset management. The firm provides investors with fundamental research and trade execution in equity, equity-linked, and fixed income securities, including corporate bonds, high yield bonds, US government and agency securities, repo finance, mortgage- and asset-backed securities, municipal bonds, whole loans and emerging markets debt, as well as commodities and derivatives. Jefferies offers companies capital markets, merger and acquisition, restructuring and other financial advisory services. Jefferies & Company, Inc. is the principal operating subsidiary of Jefferies Group, Inc. (NYSE: JEF).