Exhibit 11.1

Redwood Trust, Inc.
Computation of Per Share Earnings

                         
            Three Months   Nine Months
            Ended   Ended
            September 30, 2004
  September 30, 2004
Basic:
       
Average common shares outstanding
    21,952,606       20,674,396  
       
 
   
 
     
 
 
       
Total
    21,952,606       20,674,396  
       
 
   
 
     
 
 
       
Net Income
  $ 72,341,818     $ 178,221,052  
       
 
   
 
     
 
 
       
Per Share Amount
  $ 3.30     $ 8.62  
       
 
   
 
     
 
 
Diluted:
       
Average common shares outstanding
    21,952,606       20,674,396  
       
Net effect of dilutive stock options outstanding during the period — based on the treasury stock method
    775,763       811,812  
       
 
   
 
     
 
 
       
Total
    22,728,369       21,486,208  
       
 
   
 
     
 
 
       
Net Income
  $ 72,341,818     $ 178,221,052  
       
 
   
 
     
 
 
       
Per Share Amount
  $ 3.18     $ 8.29