| DEAL NAME | MSSTI 2007-1 |
| Closing Date | 7/6/2007 |
| |
| Initial Collateral Characteristics | |
| Principal Balance ($) | 735,101,721 |
| |
| Sellers | First NLC Subprime(55.75%),AHL(37.33%) |
| Servicers | SX(98.47%) |
| |
| Number of Loans | 4,420 |
| Avg Loan Balance ($) | 166,312 |
| |
| Fixed/Floating | |
| % FRM | 27.05 |
| % ARM | 72.95 |
| |
| %IO | 8.65 |
| Wtd Avg IO Term (months) | 60 |
| |
| Wtd Avg Current Mortgage Rate (%) | 8.645 |
| Non-Zero Wtd Avg Margin (%) | 6.443 |
| Non-Zero Wtd Avg Initial Cap (%) | 2.459 |
| Non-Zero Wtd Avg Periodic Cap (%) | 1.488 |
| |
| Lien Composition | |
| % 1st Lien | 95.06 |
| % 2nd Lien | 4.94 |
| |
| Non-Zero Wtd Avg FICO | 610 |
| % FICO below 600 (inc. N/A) | 43.59 |
| % FICO below 550 (inc. N/A) | 17.47 |
| |
| Wtd Avg Comb Orig LTV | 80.71 |
| % CLTV > 80 | 42.88 |
| % CLTV > 90 | 12.40 |
| % CLTV > 95 | 8.48 |
| |
| % Silent Seconds | 10.45 |
| CLTV incl. all simul. liens (%) | 83.58 |
| |
| Documentation Level | |
| % Full Documentation | 54.83 |
| % Stated Documentation | 42.94 |
| % Limited Documentation | 0.54 |
| |
| % Owner Occupied | 90.96 |
| |
| Loan Purpose | |
| % Cashout Refinance | 70.95 |
| % Purchase | 25.41 |
| % Rate Term Refinance | 3.64 |
| |
| State Concentration (Over 5%) | CA(19.62%),FL(17.85%),IL(8.80%),AZ(5.67%) |
| |
| % Prepay Penalty | 71.05 |
| |
| Wtd Avg Std Orig Term (months) | 355 |
| Wtd Avg Std Rem Term (months) | 352 |
| Wtd Average Loan Age (months) | 3 |
