The Big Shift in Mortgage Lending That Poses Risks to the Housing Market

Nonbank mortgage companies have largely replaced traditional banks as the primary lenders and servicers for federally backed mortgages, with their market share of servicing rising from 27% in 2014 to 66% in 2024. This shift was primarily driven by post-Great Recession regulatory changes that increased capital requirements for banks, prompting them to retreat from the mortgage sector. While nonbanks have improved market access through technology and expanded lending to underserved groups, their reliance on short-term credit lines poses significant systemic risks to the housing market and federal taxpayers.

Following the Great Recession, traditional banks significantly reduced their presence in the mortgage market, largely due to increased capital requirements that made holding mortgages more expensive. Nonbank mortgage companies, such as Rocket Mortgage, filled this void and have become the dominant force in the industry over the last decade. According to a new GAO report, the share of federally backed mortgages serviced by nonbanks surged from 27% in 2014 to 66% in 2024. These entities have leveraged technology to streamline the application process, allowing consumers to complete mortgages entirely online, and have played a critical role in providing credit to lower-income households and groups that historically faced barriers to homeownership.

Unlike traditional banks, nonbank mortgage companies do not take deposits to fund their operations or provide a cushion against financial stress. Instead, they rely heavily on short-term credit lines to finance loans and maintain operations. This financial structure makes them particularly vulnerable to economic downturns; if credit lines are restricted during periods of stress, nonbanks may struggle to meet financial obligations or issue new mortgages. The GAO warns that the failure of a large nonbank, or a cluster of smaller ones, could severely disrupt the mortgage market. Furthermore, because the federal government provides insurance and guarantees for these loans, American taxpayers could be responsible for covering losses resulting from such failures.

Despite their significant market share, nonbank mortgage companies generally lack a federal regulator dedicated to overseeing their safety and soundness. Currently, monitoring is split among entities like Ginnie Mae and the Federal Housing Finance Agency (FHFA), which oversee the stability of mortgage securities markets. However, the GAO identified critical areas for improvement in how these agencies monitor the financial health of nonbanks. Jill Naamane, GAO Director of Financial Markets and Community Investment, highlighted recommendations for Ginnie Mae and FHFA to enhance their financial monitoring and crisis planning. These improvements are intended to better prepare the federal government for potential market disruptions and ensure the continued stability of the residential mortgage sector.