PIMCO Corporate Opportunity Fund Reports Results for the Financial Quarter and Six Months Ended May 31, 2007


NEW YORK, Aug. 1, 2007 (PRIME NEWSWIRE) -- PIMCO Corporate Opportunity Fund (the "Fund") (NYSE:PTY), a closed-end management investment company, which seeks maximum total return through a combination of current income and capital appreciation, today announced its results for the fiscal quarter and six months ended May 31, 2007.


                                    At May 31, 2007    At May 31, 2006
                                    ---------------    ---------------
 Net Assets (a)                      $1,550,488,516     $1,549,709,346
 Common Shares Outstanding               65,799,064         65,271,643
 Net Asset Value ("NAV")                     $14.98             $15.09
 Market Price                                $16.37             $17.06
 Premium to NAV                                9.28%             13.06%



                                      Quarter ended      Quarter ended
                                      May 31, 2007       May 31, 2006
                                       ------------      -------------
 Net Investment Income (b)              $24,879,791        $26,955,333
 Per Share (b)                                $0.38              $0.42
 Net Realized and Change in
  Unrealized Loss (b)                  $(19,620,094)      $(36,803,544)
 Per Common Share (b)                        $(0.29)            $(0.56)
 3 Month Average Overdistributed Net
   Investment Income Per Common Share (c)  $(0.0590)          $(0.0192)


                                   Six Months ended   Six Months ended
                                       May 31, 2007       May 31, 2006
                                       ------------       ------------
 Net Investment Income (b)              $50,133,696        $52,273,175
 Per Share (b)                                $0.76              $0.81
 Net Realized and Change in
  Unrealized Loss (b)                  $(12,137,031)      $(15,164,781)
 Per Common Share (b)                        $(0.18)            $(0.23)


 (a) Net assets are inclusive of market value of Preferred Shares of
     $565 million.

 (b)  The information provided is in accordance with generally accepted
      accounting principles ("GAAP"), which requires the Fund to treat
      amounts received (paid) by the Fund under swap agreements as net
      realized gain (loss). However, these amounts are treated as net
      income (loss) for federal income tax purposes. By using GAAP, Net
      Investment Income for the fiscal quarter and six months ended May
      31, 2007 was $3,434,129 ($0.05 per common share) and $5,311,468
      ($0.08 per common share) lower (and Net Realized and Change in
      Unrealized Loss correspondingly lower) than those figures would
      have been if swap amounts were treated as net income (loss) in
      accordance with federal income tax treatment. By using GAAP, Net
      Investment Income for the fiscal quarter and six months ended May
      31, 2006 was $4,918,762 ($0.08 per common share) and $9,464,086
      ($0.15 per common share) lower (and Net Realized and Change in
      Unrealized Loss correspondingly lower) than those figures would
      have been if swap amounts were treated as net income (loss) in
      accordance with federal income tax treatment.

 (c)  Calculated using the estimated accumulated (fiscal year-to-date)
      month-end tax-basis balances for the three months ended May 31,
      2007 and May 31, 2006, respectively. Please note that generally
      there is a close correlation between what the Fund earns (net of
      expenses) and what it pays in monthly dividends. However, since
      net earning rates fluctuate from month to month while monthly
      dividends have remained relatively stable, there will be periods
      when the Fund may modestly over-earn or under-earn its monthly
      dividend, which would have the effect of adding to or subtracting
      from the Fund's undistributed (overdistributed) net investment
      income balance. Fund management analyzes the Fund's current and
      projected net earning rates prior to recommending dividend
      amounts to the Fund's Board of Trustees for declaration. There
      can be no assurance that the current dividend rate or the
      undistributed (overdistributed) net investment income balance
      will remain constant. Inclusive of amounts received under swap
      agreements, in accordance with federal income tax treatment.

Allianz Global Investors Fund Management LLC, an indirect, wholly-owned subsidiary of Allianz Global Investors of America L.P., serves as the Fund's investment manager and is a member of Munich-based Allianz Group (NYSE:AZ). Pacific Investment Management Company LLC, an Allianz Global Investors Fund Management affiliate, serves as the investment adviser.

The Fund's daily New York Stock Exchange closing price, net asset value per share, as well as other information, is available at http://www.allianzinvestors.com/closedendfunds or by calling the Fund's shareholder servicing agent at (800) 331-1710.

The financial information contained herein is solely based upon the data available at the time of publication of this press release, and there is no assurance that future results will be the same or similar to what is reported herein. Information that was obtained from third party sources we believe to be reliable is not guaranteed as to its accuracy or completeness. This press release contains no recommendations to buy or sell any specific securities and should not be considered investment advice of any kind. Past performance is no guarantee of future results and the investment returns generated by the Fund will fluctuate. In making any investment decision, individuals should utilize other information sources and the advice of their own professional adviser.



            

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