FOR IMMEDIATE DISTRIBUTION

JEFFERIES TO HOST 3RD GLOBAL CLEAN TECHNOLOGY CONFERENCE ON MAY 2ND IN NEW YORK CITY

NEW YORK, February 27, 2007 -- Jefferies & Company, Inc., the principal operating subsidiary of Jefferies Group, Inc. (NYSE: JEF), today announced that it will host its 3rd Global Clean Technology Conference on May 2, 2007 in New York City.

The conference will showcase many of the leading players and emerging growth companies who are addressing today’s critical issues in energy supply and security, environmental concerns and sustainability challenges. The relevant range of technologies likely to be covered include solar power, fuel cells, ultracapacitors, advanced batteries, microturbines, energy demand response, energy infrastructure, biofuels, biomaterials and hydrogen generation.

Conference participants currently include:*

American Superconductor Corporation (AMSC)
Ballard Power Systems, Inc. (BLDP)
Capstone Turbine Corporation (CPST)
Ceres, Inc.
Composite Technology Corporation (CPTC)
Distributed Energy Systems Corporation (DESC)
Diversa Corporation (DVSA)
DuPont (DD)
Evergreen Solar, Inc. (ESLR)
Fuel Tech, Inc. (FTEK)
FuelCell Energy, Inc. (FCEL)
Hydrogenics Corporation (HYG)
Konarka Technologies, Inc.
MEMC Electronic Materials, Inc. (WFR)
Metabolix, Inc. (MBLX)
Nova Biosource Fuels, Inc. (NVBF)
Novozymes A/S (NZYMA)
Renewable Energy Corporation ASA (REC)
Siemens AG (SIE)
Silver Spring Networks
Solar Integrated Technologies, Inc. (SIT)
SunPower Corporation (SPWR)
Suntech Power Holdings Co., Ltd. (STP)

*subject to change

An audio webcast of each presentation, both live and replay, will be available at the discretion of the presenting companies, and will be accessible at www.jefferies.com.

As part of its firm-wide focus on this burgeoning area, Jefferies recently launched a number of equity indices benchmarking emerging opportunities in the clean technology and alternative energy sectors. The Jefferies Global Clean Technology IndexSM is a composite index of nearly 50 leading small- and mid-cap companies engaged in the sector worldwide. In addition to the composite index, Jefferies has launched targeted sub-indices tracking companies focused on energy generation, energy storage and industrial biotechnology. Additional information about Jefferies’ clean technology and alternative energy indices is available at www.jefferies.com/indices.

For further information about Jefferies 3rd Global Clean Technology Conference, please contact your institutional sales representative or Jodi Pulman (212-284-2581; jpulman@Jefferies.com).

About Jefferies

Jefferies, a global investment bank and institutional securities firm, has served growing and mid-sized companies and their investors for over 40 years. Headquartered in New York, with more than 25 offices around the world, Jefferies provides clients with capital markets and financial advisory services, institutional brokerage, securities research and asset management. The firm is a leading provider of trade execution in equity, high yield, convertible and international securities for institutional investors and high net worth individuals. Jefferies & Company, Inc. is the principal operating subsidiary of Jefferies Group, Inc. (NYSE: JEF; www.jefferies.com).

CONTACT:
Jefferies: Tom Tarrant
(203) 708-5989
ttarrant@jefferies.com

Cubitt Jacobs & Prosek:
(203) 378-1152 / Ext.106
Lauren@cjpcom.com