| 
                
            
            	| 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 | Sep | 0 | 0 | 0 | 365 |  
                            |  | 3.5 | Oct | 862 | 1,177 | 0 | 1,066 |  
                            |  | 4 | Sep | 0 | 200 | 0 | 314 |  
                            |  | 4 | Oct | 1,154 | 1,492 | 0 | 958 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 3 | Oct | 52 | 78 | 0 | 0 |  
                            |  | 3.5 | Oct | 52 | 100 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,120 | 3,047 | 0 | 2,703 |  
                          	| *Does not include trades associated with small value exercises. |  |  |