| 
                
            
            	| 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 | 1,044 | 1,131 | 0 | 511 |  
                            |  | 4 | Sep | 1,090 | 1,549 | 0 | 460 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 2.5 | Sep | 0 | 102 | 0 | 0 |  
                            |  | 3 | Sep | 254 | 306 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,388 | 3,088 | 0 | 971 |  
                          	| *Does not include trades associated with small value exercises. |  |  |