source:
  type: guide
  id: fnma-svc-f-3-25
  authority: 'Fannie Mae Servicing Guide F-3-25 — Acronyms and Glossary of Defined
    Terms: Y'
  description: 'Fannie Mae Servicing Guide F-3-25 — Acronyms and Glossary of Defined
    Terms: Y.'
  coverage_tier: operative
obligations:
- id: fnma-svc-f-3-25-full
  canonical_id: fnma-svc-f-3-25-full
  section: 'Fannie Mae Servicing Guide F-3-25 — Acronyms and Glossary of Defined Terms:
    Y'
  type: do
  tags:
  - regulator-direct
  - fnma
  - servicing-guide
  - corpus-expansion
  - tier-operative
  primary_source:
    tier: 1
    authority: 'Fannie Mae Servicing Guide F-3-25 — Acronyms and Glossary of Defined
      Terms: Y'
    source_class: fnma-guide
    source_url: https://singlefamily.fanniemae.com/media/document/pdf/servicing-guide
    snapshot_id: cf63a82bbb4adfba
    fetched_at: '2026-05-22T23:53:19Z'
    content_hash: sha256:89df66c43baad07f8a8dd9d224492fff7d15e8839edba02ad0e74c7e50fe5da3
    paragraph_quote: 'F-3-25, Acronyms and Glossary of Deﬁned Terms: Y (11/12/2014)
      yield diﬀerential adjustment An amount paid to the servicer of a portfolio ﬁrst
      mortgage loan when the initial interest rate of a mortgage loan exceeds Fannie
      Mae’s required yield for the commitment under which the mortgage loan was purchased.
      For ARM loans, a yield diﬀerential adjustment occurs if there is excess “margin”
      rather than yield.'
  judgment: false
