With affordability at the forefront of national discourse, we revisit its implications for the municipal market. We previously discussed the credit challenges associated with managing cost of living via tax policy. In this post, we focus on municipal single family and multifamily housing bonds.
Affordable Housing in the Municipal Market
Housing has become a more consequential sector of the municipal market as affordability pressures have intensified. Behind that shift is a sustained shortfall in supply: our colleagues in Quantitative Research estimate the housing shortage as a deficit of up to 5 million units due to underbuilding since the Great Financial Crisis coupled with growing demand. Home prices and rents have also surged since the pandemic. State and local governments have responded by expanding various housing programs financed with municipal bonds. While still a relatively small sector of the market, representing 7% of issuance in 2025, it stands out as one of the top performers (in 2025 and year-to-date) and an excellent source of carry. Due to their structural complexity and longer duration, housing bonds command a sizable yield premium to more traditional municipal bonds of equivalent ratings.
The sector can be broken into two categories, Single Family Housing, which offers mortgage access for home purchases and Multi-Family Housing, which funds the construction of apartment buildings with affordable or subsidized rental units.
Single Family Housing: Mortgage Pools
State and local housing finance authorities (HFAs) issue municipal bonds to finance low interest rate single family mortgages and provide down payment assistance, helping first time homebuyers clear a major hurdle to ownership. Municipal bonds fund the mortgages, which also serve as the source of repayment for the bonds. Credit quality is strong due to the highly overcollateralized nature of the deals and the use of mortgage enhancements; Fannie Mae, Freddie Mac, Ginnie Mae, and other federal programs guarantee 60% of principal and interest payments for the underlying loans on average and up to 100% depending on the deal.
The key challenge is cash flow predictability given the sub sector’s sensitivity to changes in interest rates. When mortgage rates decline, borrowers tend to refinance which can lead to early repayment of the housing bonds they secure. Conversely, in a rising rate environment, slower than anticipated refinancings can lead to duration extension. However, in contrast to Agency MBS, municipal HFAs have discretion in how they apply prepayments, which can be used to fund new mortgages in lieu of returning cash to bondholders. By focusing on higher credit-quality HFAs and selecting deals with structural prepayment protections and strong collateral, we aim to capture attractive yields in the sector while seeking improved cash-flow predictability.
Multifamily Housing: Project Finance
Municipal bonds also finance the construction of rental housing for low income tenants. Credit quality is more variable in this sub sector, ranging from high quality federally guaranteed loans to speculative deals that more closely resemble commercial real estate project finance.
Risks include cost overruns, construction delays, cash flow volatility during the lease up period, and refinancing risk. Nonetheless multifamily housing benefits from substantial federal support, from Low Income Housing Tax Credits (LIHTC) for developers and Section 8 rental assistance for tenants, to the provision of permanent financing through Freddie Mac and Fannie Mae. In this subsector, we prefer deals with strong collateral, prudent use of leverage, and projects led by experienced developers.
Bottom Line
The municipal housing market has grown rapidly since the pandemic as the national housing shortage has become an economic and political priority. We expect the trend will continue since housing bonds represent an efficient way to finance affordable housing at scale with support from federal, state, and local governments.
Our disciplined investment process built on deep research expertise and cross asset class collaboration has allowed us to successfully add exposure across our active strategies. For investors, a comprehensive analytical framework that considers both credit and structural risks is critical given the idiosyncratic nature of the sector. Those who develop one may be well-positioned to take advantage of the sector’s attractive risk-adjusted returns, while diversifying away from the more traditional revenue and general obligation sectors and gaining exposure to one of the strongest secular themes.