Regulation — housing-specific
FHFA Advisory Bulletin AB 2021-01 — Enterprise AI/ML Standards
FHFA's Advisory Bulletin sets AI/ML expectations for Fannie Mae + Freddie Mac and, by counterparty flow-down, for the sellers and servicers who deliver loans to them. If your lender sells to the GSEs, this bulletin's expectations reach into your underwriting AI whether you built it or bought it.
What the regulation actually says
"The Enterprises should establish and maintain an AI/ML risk-management framework that includes: governance structure and roles; AI/ML risk identification, measurement, and monitoring; model risk management aligned with existing supervisory guidance (SR 11-7); and controls over data quality, bias, explainability, and third-party AI/ML."
FHFA Advisory Bulletin AB 2021-01 — Enterprise AI/ML Standards (Feb 2021)
What this means in plain English
- GSE counterparty expectations flow down. If Fannie / Freddie must operate to a standard, they push equivalent expectations to their sellers and servicers.
- Third-party AI is inside the framework. Buying an underwriting AI from a vendor does not transfer the risk-management duty to the vendor.
- Bias + explainability + data quality are named risk categories. All three land squarely on the sample scenario.
What triggers the exposure in the sample
~740 H3 applications routed to decline / non-QM during the drift window. Any loans that were pushed through the AI toward conforming lanes carry GSE counterparty risk if the AI stance cannot be defended. AB 2021-01 puts the seller / servicer on the hook to show its own AI governance.
What the $499 Snapshot shows against this rule
- Independent-verifier declaration — the "third-party AI/ML control" record
- Distributional-shape monitoring across audit period — the bias + data-quality monitoring record
- Model-version + input-snapshot retention — the explainability foundation
- 3 fix-first items scoped to your lender's AI surface — the "measurement + monitoring" starting point
$499 Snapshot. 3 business days.
Independent-verifier determination + counterparty-facing record + 3 fix-first items.
Buy $499
Snapshot credit applies to Baseline ($2,500) or Enterprise Attestation ($35-55K) upgrade within 30 days.