MASTR Asset Backed Securities Trust Mastr Asset Backed Securities Trust 2007-HE1 is a security (CUSIP 576457AD7) tracked across SEC portfolio filings. 3 registered fund positions totaling $3.9M via N-PORT as of 2026-03-31.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| TCW STRATEGIC INCOME FUND INC | TCW STRATEGIC INCOME FUND INC | $1.7M | 55.89% |
| BlackRock Total Return Fund | BlackRock Bond Fund, Inc. | $1.1M | 0.64% |
| Master Total Return Portfolio | Master Bond LLC | $1.1M | 0.56% |