MASTR Seasoned Securitization Trust MASTR Seasoned Securitization Trust 2004-1 is a security (CUSIP 55265WBD4) tracked across SEC portfolio filings. 1 registered fund positions totaling $60K via N-PORT as of 2026-03-31.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| TCW METWEST LOW DURATION BOND FUND | TCW Metropolitan West Funds | $60K | 0.68% |