| 
                
            
            	| Purchases summarize all trades executed during the indicated period including purchases associated with dollar rolls.* |  
                     
                      | Transactions 
                        ($ million) |   
                      | 
                           
                            | Maturity | Coupon | Settlement 
                                Month | FHLMC | FNMA | GNMA | GNMA2 |  
                            | 30 Year | 3 | Aug | 368 | 450 | 0 | 315 |  
                            |  | 3.5 | Aug | 1,357 | 1,986 | 0 | 1,608 |  
                            |  | 4 | Aug | 269 | 443 | 0 | 726 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 2.5 | Aug | 274 | 356 | 0 | 0 |  
                            |  | 3 | Aug | 274 | 430 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,542 | 3,665 | 0 | 2,649 |  
                          	| *Does not include trades associated with small value exercises. |  |  |