Fannie Mae's Mission and Role in the U.S. Housing Finance System

Fannie Mae is the single largest source of mortgage financing in the United States — but most candidates walk into interviews unable to clearly explain what the company actually does. This module breaks down how Fannie Mae buys mortgages from lenders, packages them into mortgage-backed securities, and provides liquidity that makes the 30-year fixed-rate mortgage possible. Understanding the secondary-market mechanism is the foundation for every other interview answer.