LONDON and NEW YORK, December 18 /PRNewswire/ --

Ecofin Ltd., a multi-billion dollar asset management firm, which invests
in global utilities and infrastructure sectors, has gone live with the
Execta(TM) Portfolio Management and Execution Management System ("EMS") from
Tethys Technology, Inc. Ecofin has implemented Execta simultaneously in
London and New York and plans to implement TotalTCA(TM), the pre-trade,
real-time and post-trade transaction cost analysis offering from Tethys, in
the near future.

"Tethys products allow us to take advantage of trading opportunities
around the world and they provide us access to state-of-art algorithmic
trading technology and analytics on our desktop. In addition Tethys has
helped us streamline the entire trade-booking and allocation process. 
Tethys Technology was one of the few vendors who could support the workflow
we required.  Ecofin chose Execta(TM) for its flexibility, low latency,
multi-asset algorithmic trading capabilities and the high-quality support.
As our firm continues to grow, we needed a system that can easily scale to
support new trading strategies and investment funds," says Mike Earlywine,
Ecofin's trader.

"We are pleased to have Ecofin as client.  They are a sophisticated firm
with deep understanding of markets and technology," said Nitin Gambhir, Chief
Executive Officer and President of Tethys about Ecofin. "Tethys is committed
to providing leading-edge analytics and trading technology to our clients
globally."

Tethys' Execta(TM) EMS Platform is the most powerful and flexible
broker-neutral algorithmic trading and portfolio management solution
available today.  It supports global trading in equities, options, futures
and F/X. The platform includes modules for trading strategy simulation and
optimal execution strategy determination.

About Tethys Technology, Inc.

Tethys Technology, Inc. is an innovative investment technology research
and development firm. The firm's Execta(TM) EMS platform is the fastest
growing institutional trading platform today. TotalTCA(TM) is the firm's
comprehensive multi-asset class transaction cost analysis solution. Tethys
provides comprehensive portfolio management and trade execution tools for
hedge funds, mutual funds and broker dealers.  In addition, Tethys has a
substantial market-microstructure research effort focused on development of
analytics and custom algorithms to assist clients in reducing the magnitude
and variance of transaction costs. For more information, please visit
www.TethysTech.com.

About Ecofin Limited

Ecofin is an investment firm which specializes in the global utility and
infrastructure sectors.  The firm, which was founded in 1991, is based in
London and has offices in London, New York, Geneva and Hong Kong. Ecofin has
approximately US$5.1 billion of assets under management. For more information,
please visit www.ecofin.co.uk.

Contact:

    Tethys Technology, Inc.

    In the U.S., Deirdre Cogger, DeirdreC@TethysTech.com
    +1-212-509-5628

    In the UK, Savaas Spanias, Sapnias@TethysTech.com
    +44-207016-7826


    Web site:  http://www.tethystech.com 
               http://www.ecofin.co.uk