| 
                
                    
                        | 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 | Feb | 238 | 214 | 0 | 394 |  
                                    |  | 3.5 | Feb | 1,050 | 1,612 | 0 | 1,475 |  
                                    |  | 4 | Feb | 261 | 472 | 0 | 816 |  
                                    |  |  |  |  |  |  |  |  
                                    | 15 Year | 2.5 | Feb | 70 | 70 | 0 | 0 |  
                                    |  | 3 | Feb | 158 | 175 | 0 | 0 |  
                                    |  |  |  |  |  |  |  |  
                                    | Total |  |  | 1,777 | 2,543 | 0 | 2,685 |  
                                    | *Does not include trades associated with small value exercises. |  |  |