THOMSON FINANCIAL TO MARKET CMS BONDEDGE FIXED INCOME PORTFOLIO ANALYTICS IN EUROPE.

London, 9 May 2005 – Thomson Financial, an operating unit of The Thomson Corporation (NYSE: TOC; TSX: TOC) and leading provider of information and technology solutions to the worldwide financial community, and CMS BondEdge, a division of Interactive Data Corporation (NYSE: IDC), today announced an agreement whereby Thomson Financial will market the BondEdge fixed income portfolio analytics system alongside Thomson ONE for Investment Management, to institutional asset managers in Europe.

BondEdge, an industry leading solution for fixed income portfolio analytics, complements Thompson ONE for Investment Management and demonstrates Thomson Financial’s commitment to the investment management community with its best of breed approach to the industry. Thomson ONE for Investment Management offers leading equity portfolio analytics along with research, real-time data and single security analytics, including the market leading Thomson Datastream historical time series application. The BondEdge system is a long-established leader in fixed income portfolio analytics, offering both returns-based attribution as well as factor-based attribution, along with a variety of other portfolio reporting, simulation and benchmark comparison tools.

David Bilbé, European Commercial Director, Thomson Financial said: “Many of our clients and prospects throughout Europe have expressed a desire to obtain both equity and fixed income portfolio attribution from a single provider. Market leading equity attribution is already embedded into Thomson ONE for Investment Management. As we are committed to providing clients with best of breed applications, it made sense to draw on the expertise CMS BondEdge has developed in fixed income portfolio analysis solutions over the last 25 years to address this opportunity in Europe.”

Laurie Adami, President of CMS BondEdge, added: “Fixed income attribution is clearly becoming increasingly important in the European market and clients want to work with a credible partner that can deliver a solution that is aligned to their requirements. Thomson Financial has such a strong presence with the asset management community in Europe and we recognized that working together would allow us both to serve the needs of this market effectively.”

Thomson Financial’s sales force will market the BondEdge application to fund managers across Europe, with CMS BondEdge providing product sales expertise, implementation, client training and ongoing support.

Thomson ONE for Investment Management combines Thomson Datastream’s encyclopedic databases with Thomson Financial’s interactive portfolio analytics service, in addition to Thomson’s global real-time market data and news, and extensive estimates, research and fundamental content. Thomson ONE for Investment Management has been built around investment management workflows. The open application framework reflects and facilitates many different functions; from uncovering opportunities and evaluating market trends to understanding and communicating sources of portfolio performance. Interactive functionality gives quick and easy access to in-depth content across the available data universe, making it easy to move between key data sets and analytic or charting tools, while maintaining context on a particular company. Users can easily navigate from monitoring a ticker in real-time to viewing the company’s broker estimates or charting its historical time series versus the sector or market.

CMS BondEdge has been offering comprehensive fixed income performance attribution tools for more than 20 years. In addition to proprietary modelling techniques, the BondEdge transaction-based performance attribution offering includes access to global data and indices. For full flexibility, either factor-based or returns-based analysis may be employed.

###

About Thomson Financial
Thomson Financial is a US$1.73 billion provider of information and technology solutions to the worldwide financial community. Through the widest range of products and services in the industry, Thomson Financial helps clients in more than 70 countries make better decisions, be more productive and achieve superior results. Thomson Financial is part of The Thomson Corporation (www.thomson.com), a global leader in providing integrated information solutions to more than 20 million business and professional customers in the fields of law, tax, accounting, financial services, higher education, reference information, corporate e-learning and assessment, scientific research and healthcare. With revenues of US$8.10 billion, The Thomson Corporation lists its common shares on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

About Interactive Data
Interactive Data Corporation (NYSE: IDC) is a leading global provider of securities pricing, financial information and analytic tools to institutional and individual investors. The company supplies time-sensitive pricing (including evaluated pricing), dividend, corporate action and descriptive information for more than 3.5 million securities traded around the world, including hard-to-value instruments. Many of the world's best-known financial service and software companies subscribe to the company's services in support of their trading, analysis, portfolio management and valuation activities.

Interactive Data is headquartered in Bedford, Massachusetts. Through its branded businesses, FT Interactive Data, ComStock, CMS BondEdge and eSignal, Interactive Data has approximately 1,800 employees in offices located throughout North America, Europe, Asia and Australia. Pearson plc (LSE: PSON; NYSE: PSO), an international media company whose businesses include the Financial Times Group, Pearson Education and the Penguin Group, owns approximately 60 percent of the outstanding common stock of Interactive Data Corporation. For further information please see: www.interactivedata.com

About CMS BondEdge
CMS BondEdge, an Interactive Data division (NYSE: IDC), has been a provider of fixed income portfolio analytics to the investment community for over 25 years. Its client base includes more than 550 leading banks, investment managers, brokerage firms, insurance companies and pension funds throughout North America and Europe. CMS BondEdge is recognised in the industry for BondEdge®. Dedicated exclusively to fixed income, BondEdge® delivers the portfolio analysis tools enabling its customers to identify opportunities and analyse portfolio risk using the latest modelling techniques and cutting-edge research.