| 
                
            
            	| 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 | May | 350 | 500 | 0 | 550 |  
                            |  | 3.5 | June | 200 | 611 | 0 | 300 |  
                            |  | 4 | May | 1,063 | 1,217 | 0 | 400 |  
                            |  | 4 | June | 400 | 1,225 | 0 | 400 |  
                            |  |  |  |  |  |  |  |  
                            | 15 Year | 3 | May | 0 | 150 | 0 | 0 |  
                            |  | 3 | June | 50 | 100 | 0 | 0 |  
                            |  | 3.5 | June | 100 | 200 | 0 | 0 |  
                            |  |  |  |  |  |  |  |   
                            | Total |  |  | 2,163 | 4,003 | 0 | 1,650 |  
                          	| *Does not include trades associated with small value exercises. |  |  |