PIMCO Corporate Opportunity Fund Reports Results for the Fiscal Quarter and Six Months Ended May 31, 2008


NEW YORK, July 31, 2008 (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, 2008.



                                               At May 31,             
                                               ----------             
                                          2008             2007
                                          ----             ----
 Net Assets (a)                     $1,466,640,972   $1,550,488,516   
 Common Shares Outstanding              66,167,307       65,799,064   
 Net Asset Value ("NAV")                    $13.63           $14.98   
 Market Price                               $14.66           $16.37   
 Premium to NAV                              7.56%            9.28%   
                                                                      
                                                                      
                                         Quarter ended May 31,        
                                         ---------------------        
                                           2008            2007
                                           ----            ----
 Net Investment Income (b)             $23,558,681      $24,879,791   
 Per Share (b)                               $0.35            $0.38   
 Net Realized and Change                                              
  in Unrealized Loss (b)              $(21,982,459)    $(19,620,094)  
 Per Common Share (b)                       $(0.32)          $(0.29)  
 Undistributed                                                        
  (Overdistributed)                                                   
  Net Investment                                                      
  Income Per Common Share (c)              $0.0969(d)     $(0.0590)(e)
                                                                      
                                                                      
                                         Six Months ended May 31,     
                                         ------------------------     
                                           2008            2007
                                           ----            ----
 Net Investment Income (b)             $48,537,338      $50,133,696   
 Per Share (b)                               $0.73            $0.76   
 Net Realized and Change
  in Unrealized Loss (b)              $(38,262,383)    $(12,137,031)  
 Per Common Share (b)                       $(0.57)          $(0.18)  

 (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, 2008 was $9,462,620 ($0.14 per common        
 share) and $15,898,376 ($0.24 per common share), lower (and Net       
 Realized and Change in Unrealized Gain (Loss) correspondingly         
 higher (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, 2007       
 was $3,434,129 ($0.05 per common share) and $5,311,468 ($0.08         
 per common shares), lower (and Net Realized and Change in Unrealized  
 Gain (Loss) correspondingly higher (lower)) than those figures would  
 have been if swap amounts were treated as net income (loss) in        
 accordance with federal income tax treatment.                         
                                                                       
 (c) 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 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 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) income balance will remain            
 constant. Inclusive of amounts earned under swap agreements, in       
 accordance with federal income tax treatment.                         
                                                                       
 (d) Calculated using the accumulated balance at May 31, 2008.         
                                                                       
 (e) Calculated using the average fiscal year-to-date month-end        
 balances for the three months ended May 31, 2007.                     

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 Fund's sub-adviser.

The Fund's daily New York Stock Exchange closing price, net asset value per share, as well as other information, is available at 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 any 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. There can be no assurance that the Fund will meet its investment objective. In making any investment decision, individuals should utilize other information sources and the advice of their own professional adviser.



            

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