A New Asset Class for Credit Unions: The 80/18/2 Mortgage and Diversified Home Equity Lending
Many Millennial
and Gen Z consumers remain priced out of the homebuying market due to rising
housing costs, elevated mortgage rates, economic uncertainty, and the high down
payments or private mortgage insurance often required by traditional mortgage products.
What if credit unions could offer a low‑down‑payment mortgage with no PMI, generate attractive yields, and potentially reduce concentration risk at the same time?
Credit unions have long distinguished themselves through prudent underwriting, member alignment, and conservative balance sheet management. Yet even well‑underwritten mortgage portfolios remain exposed to one unavoidable reality: housing market volatility.
Members increasingly require high‑LTV financing as home prices and living expenses rise faster than incomes. At the same time, credit unions must carefully manage capital, protect their balance sheets, and compete with FHA and PMI‑based conventional mortgages.
The question for credit union leadership is not whether to grow mortgage lending—but how to grow while improving risk‑adjusted returns. A capital‑efficient 80/18/2 mortgage structure, combined with a broader housing‑risk diversification framework and a complementary product called Home Secure, may offer a disciplined path worth exploring. Together, these structures introduce the possibility of something unusual in housing finance: a high‑yield mortgage and home‑equity asset with expected losses comparable to prime mortgage credit.
THE 80/18/2 MORTGAGE STRUCTURE
Mortgage credit risk can be reduced not only through underwriting discipline, but also through diversification embedded within the mortgage structure itself.
The basic design is straightforward:
- 80% first‑lien mortgage
- 18% subordinated second‑lien mortgage
- 2% borrower down payment
The first mortgage is priced competitively with the market. The subordinated 18% second lien carries a higher contractual coupon—typically around 8.5% in illustrative examples. Despite the higher second‑lien yield, the borrower’s combined payment can remain competitive with existing high‑LTV financing options.
Typical borrower outcomes may include:
- Payments near parity with FHA loans
- No mortgage insurance premiums
- Monthly payments often $75–$125 lower than typical PMI‑based 97–98% LTV loans
(depending on PMI pricing)
Attractive Yield with Prime‑Like Expected Loss:
The 18% second mortgage can generate roughly an 8.5% yield while modeling indicates a through‑the‑cycle lifetime expected loss of approximately 15–20 basis points.