| 
                
            
            	| 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 | Oct | 1,150 | 1,468 | 0 | 1,291 |  
                            |  | 4 | Oct | 835 | 1,150 | 0 | 851 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 2.5 | Oct | 52 | 52 | 0 | 0 |  
                            |  | 3 | Oct | 210 | 312 | 0 | 0 |  
                            |  | 3.5 | Oct | 52 | 52 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,299 | 3,034 | 0 | 2,142 |  
                          	| *Does not include trades associated with small value exercises. |  |  |