JP MORGAN MORTGAGE TRUST 2021-4 JPMMT 2021-4 B3 is a security (CUSIP 46652VBZ7) tracked across SEC portfolio filings. 2 registered fund positions totaling $5.5M via N-PORT as of 2026-03-31.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| BlackRock Total Return Fund | BlackRock Bond Fund, Inc. | $2.8M | 1.55% |
| Master Total Return Portfolio | Master Bond LLC | $2.7M | 1.46% |