Banks Question Basel Omission of PMI in Mortgage Weights

Why It Matters

Recognizing PMI and easing other Basel constraints would reduce banks’ capital burden, potentially reviving mortgage lending and increasing competition for GSEs, which benefits borrowers and the broader housing finance system.

Key Takeaways

• Basel III proposal currently excludes private mortgage insurance from risk‑weight calculations
• Fed invites industry comments on PMI inclusion; deadline June 18
• Recognizing PMI could lower capital requirements for high‑LTV loans
• Proposed rule removes cap on mortgage‑servicing assets for Tier‑1 capital
• Adjusting MSA risk weights from 250% may further ease banks’ mortgage exposure

Pulse Analysis

The Basel III end‑game proposal that the Federal Reserve and other prudential regulators are polishing still treats private mortgage insurance (PMI) as invisible in the capital formula for single‑family loans. Under the current framework, high‑loan‑to‑value mortgages that carry PMI receive risk weights below 100 percent, but the insurance itself does not earn a separate credit‑risk mitigation credit. Regulators argue that the omission mirrors the post‑2008 experience when many PMI carriers faltered, yet mortgage lenders contend that the insurance materially reduces loss severity and should be reflected in lower risk weights.

Bank executives say that formally recognizing PMI could shave a few percentage points off the capital charge on 80‑95 % LTV loans, making those products more attractive relative to unsecured high‑LTV exposure. The Fed’s notice, which asks for comments by June 18, also proposes to lift the hard cap on mortgage‑servicing assets that previously forced banks to hold dollar‑for‑dollar Tier‑1 capital. In parallel, a review of metropolitan‑statistical‑area (MSA) risk weights—currently set at 250 %—signals a willingness to recalibrate overly punitive charges that have kept banks on the sidelines of the mortgage market.

If the Basel committee eventually incorporates PMI and eases the MSA and servicing‑asset rules, banks could re‑enter mortgage origination and servicing with a more balanced risk‑adjusted return profile. Such a shift would increase competition for the government‑sponsored enterprises, potentially driving down borrower costs and expanding credit access for first‑time homebuyers with limited down payments. However, structural hurdles—CFPB rules, litigation risk, and legacy market dynamics—remain, meaning that even a favorable capital treatment may only modestly boost bank participation unless paired with broader regulatory relief.