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The rating reflects the company's good competitive standing, moderate leverage, sound debt coverage metrics, and adequate liquidity to meet clearly indicated near-term external growth goals.

The "stable" outlook acknowledges Digital Realty's well-occupied portfolio, very manageable lease expirations, contractual rent hikes, and favorable mark-to-market rent profile that would cushion the operating cash flow if near-term demand weakens.

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A. William Stein, CFO and Chief Investment Officer, commented, "Achieving an investment grade rating has been a important goal for the Company since our IPO five years ago and we believe represents an inflection point for Digital Realty Trust. Access to the investment grade unsecured debt market gives us a significant competitive advantage as we pursue opportunities to grow our business in an otherwise capital constrained environment."

More information regarding Digital Realty Trust's rating assignment can be found in the Standard and Poor's research report dated November 12, 2009 available on its website at www.standardandpoors.com.

About Digital Realty Trust, Inc.

Digital Realty Trust, Inc. owns, acquires, redevelops, develops and manages technology-related real estate. The Company is focused on providing Turn-Key Datacenter(R) and Powered Base Building(R) datacenter solutions for domestic and international tenants across a variety of industry verticals ranging from information technology and Internet enterprises, to manufacturing and financial services. Digital Realty Trust's 79 properties, excluding one property held as an investment in an unconsolidated joint venture, contain applications and operations critical to the day-to-day operations of technology industry tenants and corporate enterprise datacenter tenants. Comprising approximately 14.0 million rentable square feet as of November 3, 2009, including 1.9 million square feet of space held for redevelopment, Digital Realty Trust's portfolio is located in 27 markets throughout North America and Europe. For additional information, please visit Digital Realty Trust's website at http://www.digitalrealtytrust.com.

Safe Harbor Statement

This press release contains forward-looking statements which are based on current expectations, forecasts and assumptions that involve risks and uncertainties that could cause actual outcomes and results to differ materially. Such forward looking statements include statements related to the effects of achievement of an investment grade rating, access to the investment grade unsecured debt market, the Company's competitive position and growth objectives, the strength of the Company's financial profile and the adequacy of the Company's liquidity. These risks and uncertainties include the impact of the current deterioration in global economic and market conditions; adverse economic or real estate developments in our markets or the industry sectors that we sell to; decreases in information technology spending; our dependence upon significant tenants; bankruptcy or insolvency of a major tenant or a significant number of smaller tenants; downturn of local economic conditions in our geographic markets; our inability to comply with the rules and regulations applicable to public companies or to manage our growth effectively; difficulty acquiring or operating properties in foreign jurisdictions; defaults on or non-renewal of leases by tenants; increased interest rates and operating costs; our failure to obtain necessary outside financing; restrictions on our ability to engage in certain business activities; risks related to joint venture investments; decreased rental rates or increased vacancy rates; inability to successfully develop and lease new properties and space held for redevelopment; difficulties in identifying properties to acquire and completing acquisitions; increased competition or available supply of data center space; our failure to successfully operate acquired properties; our inability to acquire off-market properties; delays or unexpected costs in development or redevelopment of properties; our failure to maintain our status as a REIT; possible adverse changes to tax laws; environmental uncertainties and risks related to natural disasters; financial market fluctuations; changes in foreign currency exchange rates; changes in foreign laws and regulations, including those related to taxation and real estate ownership and operation; and changes in real estate and zoning laws and increases in real property tax rates. For a further list and description of such risks and uncertainties, see the reports and other filings by the Company with the United States Securities and Exchange Commission, including the Company's annual report on Form 10-K for the year ended December 31, 2008 and subsequent reports on Form 10-Q and Form 8-K. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

    For Additional Information:

    A. William Stein                Pamela Matthews
    Chief Financial Officer and     Director of Investor Relations
      Chief Investment Officer      Digital Realty Trust, Inc.
    Digital Realty Trust, Inc.      +1 (415) 738-6532
    +1 (415) 738-6520

SOURCE Digital Realty Trust, Inc.

http://www.digitalrealtytrust.com

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SmarTrend analyzes over 5,000 securities simultaneously throughout the trading day and provides its subscribers with trend change alerts in real time. To get a free trial of our trading calls and maximize your trading results, please visit http://www.TradeTheTrend.com.

Get exclusive, actionable insight into how the market is expected to trend prior to market open with our free morning newsletter. Sign up at: http://www.TradeTheTrend.com/signup.html