Mortgage-Backed Security

Mortgage-Backed Security — Lenders originate mortgages and then sell groups of similar loans to aggregators or government-sponsored enterprises, which bundle them into securities. Investors who buy these securities receive a pro-rata share of the cash flows generated by borrower payments. Agency MBS — those guaranteed by Ginnie Mae, Fannie Mae, or Freddie Mac — carry minimal credit risk and trade in highly liquid markets. Private-label or non-agency MBS lack a government guarantee and therefore offer higher yields to compensate for additional default risk.

For note investors operating in the secondary market, MBS mechanics matter because many whole-loan note trades originate from the unwinding of securitized pools. When a trust liquidates non-performing loans, those assets often flow into the distressed note market as individual or small-pool offerings. Understanding the securitization chain helps buyers trace collateral history, identify prior servicer actions, and assess the quality of documentation tied to a given note.