| DEAL NAME | MSM 2007-15AR |
| Closing Date | 11/30/2007 |
| |
| Initial Collateral Characteristics | |
| Principal Balance ($) | 708,895,161 |
| |
| Sellers (Over 10%) | Morgan Stanley Mortgage Capital Inc.(47.40%),American Home Mortgage Corp.(20.46%),Quicken Loans, Inc.(11.51%) |
| |
| Servicers (Over 10%) | Saxon Mortgage, Inc.(67.00%),Central Mortgage Company(17.52%) |
| |
| Number of Loans | 1,820 |
| Avg Loan Balance ($) | 389,503 |
| |
| Fixed/Floating | |
| % FRM | - |
| % ARM | 100 |
| % Short Arm | 0.04 |
| % 3/1 or 3/6 | 2.9 |
| % 5/1 or 5/6 | 78.74 |
| % 7/1 or 7/6 | 11.4 |
| % 10/1 or 10/6 | 6.92 |
| |
| % IO | 92.14 |
| Wtd Avg IO Term (months) | 117.28 |
| |
| Wtd Avg Current Mortgage Rate (%) | 6.82 |
| < 4.00% | 0.04 |
| 4.0000% - 4.9999% | 0.13 |
| 5.0000% - 5.9999% | 11.23 |
| 6.0000% - 6.9999% | 55.17 |
| 7.0000% - 7.9999% | 24.39 |
| 8.0000% - 8.9999% | 7.62 |
| 9.0000% - 9.9999% | 1.4 |
| 10.0000% - 10.9999% | 0.02 |
| 11.000% + | - |
| |
| Non-Zero Wtd Avg Margin (%) | 2.35 |
| Non-Zero Wtd Avg Initial Cap (%) | 5.23 |
| Non-Zero Wtd Avg Periodic Cap (%) | 1.71 |
| |
| Lien Composition | |
| % 1st Lien | 100 |
| % 2nd Lien | - |
| |
| Non-Zero Wtd Avg FICO | 718.1 |
| % FICO below 660 (inc. N/A) | 6.77 |
| % FICO below 620 (inc. N/A) | 1 |
| |
| Wtd Avg Orig LTV | 79.9 |
| % LTV > 80 | 20.47 |
| % LTV > 90 | 13.02 |
| % LTV > 95 | 10.36 |
| |
| Documentation Level | |
| % Full/Alt Documentation | 28.75 |
| % Stated Documentation | 4.7 |
| % Limited Documentation | 55.17 |
| % No Documentation | 2.6 |
| % No Ratio Documentation | 7.94 |
| % Lite Documentation | 0.84 |
| |
| % Owner Occupied | 87.73 |
| % Investor | 6.51 |
| % Second Home | 5.76 |
| |
| Loan Purpose | |
| % Cashout Refinance | 28.28 |
| % Purchase | 46.91 |
| % Rate Term Refinance | 24.81 |
| |
| State Concentration (Over 5%) | CA(48.43%),FL(7.68%) |
| |
| % Prepay Penalty | 26.06 |
| |
| Wtd Avg Std Orig Term (months) | 360.3 |
| Wtd Avg Std Rem Term (months) | 354 |
| Wtd Average Loan Age (months) | 6.3 |
