| 
                
            
            	| 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 | 3.5 | Aug | 624 | 913 | 0 | 1,479 |  
                            |  | 3.5 | Sep | 158 | 183 | 0 | 0 |  
                            |  | 4 | Aug | 1,032 | 1,584 | 0 | 1,433 |  
                            |  | 4 | Sep | 297 | 409 | 0 | 0 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 3 | Aug | 263 | 314 | 0 | 0 |  
                            |  | 3.5 | Aug | 103 | 262 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,477 | 3,665 | 0 | 2,912 |  
                          	| *Does not include trades associated with small value exercises. |  |  |