Fannie Mae and Freddie Mac: Stabilizing the Mortgage Market

Federal National Mortgage Association (Fannie Mae) and Federal Home Loan Mortgage Corporation (Freddie Mac) are government-sponsored enterprises (GSEs) central to the U.S. housing finance system. Fannie Mae was created in 1938 during the Great Depression to expand the secondary mortgage market by securitizing mortgages. Freddie Mac was established in 1970 to provide competition and further support the secondary market. They widen the flow of credit to the housing market, reduce the cost of that credit, and make homeownership more accessible to more Americans.

Both GSEs were placed into conservatorship by the Federal Housing Finance Agency (FHFA) in 2008 due to their significant exposure to subprime mortgages and the resulting financial instability. The conservatorship aimed to stabilize the housing market and prevent further economic decline. The FHFA oversees their operations to ensure they continue to support the housing market while protecting taxpayers.

Functions and Operations:

Secondary Mortgage Market

Fannie Mae and Freddie Mac do not originate loans. Instead, they buy mortgages from lenders, package them into mortgage-backed securities (MBS), and sell them to investors. This process provides liquidity to lenders, enabling them to issue more mortgages. By purchasing mortgages, these GSEs help maintain a steady flow of funds in the housing market, which can stabilize and lower interest rates for borrowers.

Standardization

They set standards for mortgage underwriting and documentation, which helps ensure a level of quality and consistency in the loans they purchase. This standardization reduces risk for investors and helps maintain market stability.

Risk Management

Fannie Mae and Freddie Mac assume the credit risk of the mortgages they purchase. They guarantee the timely payment of principal and interest on the MBS they issue. This guarantee reduces the risk for investors, making MBS more attractive and ensuring a steady demand for these securities.

Read the rules yourself. The standardization is not a vague industry norm; it is a published rulebook, and every underwriting claim in this book that begins “Fannie requires” is checkable against it in an afternoon. Three documents carry almost all of it. The Selling Guide is the full text — roughly 1,200 pages, reissued several times a year, organized by section number (B2-1.1-01, B3-6-05), which is how a loan officer will look anything up. The Eligibility Matrix is a nine-page companion, incorporated into the Selling Guide by reference, holding every maximum LTV by occupancy and transaction type plus the credit-score and reserve grid that governs manually underwritten loans. The Expanded 97% LTV Options fact sheet summarizes the low-down-payment tier and the split between its standard and HomeReady variants (section “Low-Down-Payment Conforming Programs (Conventional 97, FHA, VA)”). When a lender tells you something is not allowed, ask which section says so. The answer is frequently that no section does — it is the lender’s own overlay, and overlays are negotiable in a way agency policy is not.

There are ongoing discussions about the future of Fannie Mae and Freddie Mac, including potential privatization or restructuring to reduce taxpayer risk and increase market competition. Reforms aim to create a more resilient housing finance system that can better withstand economic shocks. For further reading, you can refer to the FHFA’s annual reports and the congressional budget office (CBO) analysis on the financial status of Fannie Mae and Freddie Mac.