Data Broadcasting Makes $43 Million Investment in MarketWatch.com, Inc., Joining Equal Commitment From CBS.

Business & Technology Editors/Telecommunications Writers

BEDFORD, Mass.--(BUSINESS WIRE)--March 28, 2000

Proceeds to Expand Internet, Radio and Television Businesses

and Accelerate Growth

Data Broadcasting Corp. (Nasdaq:DBCC) today announced an agreement to invest $43 million in cash in MarketWatch.com (Nasdaq:MKTW).

DBC's commitment is being matched by an equally valued cash and in-kind advertising commitment from CBS Broadcasting. The agreement, signed March 28, is subject to the satisfaction of all antitrust regulatory requirements.

Under the agreement, DBC and CBS will each receive approximately 1.14 million shares of newly issued MarketWatch.com common stock at the average price for the five days prior to the signing. The combined $86 million investment brings both DBC's and CBS's ownership interests in MarketWatch to approximately 34.4% each of MarketWatch's outstanding common stock.

"We continue to believe very strongly in the prospects for MarketWatch.com," said Stuart Clark, DBC's chief executive officer. "We see this as a strategic investment which strengthens our position in the Internet space and can deliver excellent value to DBC shareholders.

"Our close relationship with MarketWatch and its joint venture with the Financial Times group, which is known as FT MarketWatch.com, is made stronger by this investment. We are also pleased that CBS shares our enthusiasm for nurturing the development of MarketWatch.com."

Larry Kramer, MarketWatch.com's president and chief executive officer, added: "It's great having two partners who are leading media players here and abroad, and as such recognize the potential of the New Media market. We now have the resources to continue to expand our Internet, television and radio businesses and to take advantage of any potential opportunities to accelerate our growth.

"We've become one of the 50 most visited sites on the Internet, and the most visited financial news and information site, by providing complete and accurate coverage of breaking news, along with expert commentary and tools that help people make and save money. We're now positioned to do that even better."

About Data Broadcasting

Data Broadcasting Corporation is the leading provider of real-time market data to the individual trader and investor. The company delivers real-time stock quotes, financial information and news to the PCs, laptops and hand-held devices of millions of users via the Internet, dedicated lines, wireless FM, cable and satellite.

With the BondEdge service from its Capital Management Sciences division, Data Broadcasting also is the leading provider of fixed income portfolio analytics used for valuation and risk management purposes.

Data Broadcasting's Internet presence includes http://www.dbc.com, http://esignal.com, http://cbs.marketwatch.com, http://insite.dbc.com, http://bondedge.com, http://sports.dbc.com and http://www.dbceuro.com.

Data Broadcasting recently merged with Financial Times Asset Management/Interactive Data, which had been a unit of the Financial Times Group of Pearson plc, the international media company.

Financial Times Asset Management is a leading source of comprehensive disclosure data, factor information and independent valuations for a comprehensive range of U.S. securities and offers full descriptive information on more than 1 million U.S. municipal bonds. It also collects and distributes corporate action information on equities and bonds from all over the world, specializing in "hard to get" information from emerging markets.

About MarketWatch.com

MarketWatch.com is an interactive financial media company, providing fast, relevant and accurate information via the Internet, television and radio to help people make and save money. The company operates a network of leading financial Web sites at http://cbs.marketwatch.com and http://www.bigcharts.com.

In addition to its comprehensive, real-time business news, financial programs and analytical tools, the company produces CBS MarketWatch Weekend, seen on many CBS television stations. The MarketWatch.com editorial staff also provides business and economic reports to The CBS Evening News with Dan Rather and CBS News' The Early Show and reports daily on CBS Television and Radio Network news programming.

MarketWatch.com also operates a financial news radio network via the Westwood One radio network. MarketWatch.com's financial news and tools are licensed in custom-designed formats by many of the Web's leading financial sites.

MarketWatch.com was founded in 1997 by Data Broadcasting Corporation and CBS Broadcasting, Inc., a wholly owned subsidiary of CBS Corporation (NYSE:CBS). MarketWatch.com is headquartered in San Francisco, with major facilities and bureaus in New York City, Minneapolis, Washington D.C., Los Angeles, Chicago, Boston, Detroit, Austin, Tokyo and London.

This news release contains forward-looking statements based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially. These forward-looking statements include, but are not limited to, Data Broadcasting's results of operations or financial condition; and future product, market and technology development. Factors that could cause actual results to differ materially include the response of competitors to the company's new services, acceptance of the Internet as a valid real-time distribution platform by institutional customers, activity levels in the securities markets and other risk factors listed in the company's 10-K, 10-Q and other reports to the Securities and Exchange Commission. Data Broadcasting disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.