| 
                
            
            	| 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 | Sep | 289 | 236 | 0 | 308 |  
                            |  | 3.5 | Sep | 1,068 | 1,654 | 0 | 1,400 |  
                            |  | 4 | Sep | 210 | 341 | 0 | 262 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 2.5 | Sep | 158 | 184 | 0 | 0 |  
                            |  | 3 | Sep | 200 | 288 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 1,925 | 2,703 | 0 | 1,970 |  
                          	| *Does not include trades associated with small value exercises. |  |  |