How Mortgage Rates Are Determined
Mortgage rates are often assumed to be set by the Federal Reserve. In reality, mortgage rates are driven primarily by financial markets. This page provides a high-level explanation of how mortgage rates are influenced and why they can change even when there is no Federal Reserve announcement.
The Federal Reserve controls short-term interest rates, often referred to as the Fed Funds rate. While those rates influence overall economic conditions, they do not directly set mortgage rates. Mortgage rates are more closely tied to longer-term market forces, particularly the bond market.
Mortgage loans are bundled together and sold to investors as mortgage-backed securities. These securities trade in the bond market alongside U.S. Treasury bonds and other fixed-income investments.
When investors buy bonds, prices tend to rise and yields fall.. When yields fall, lenders are generally able to offer lower mortgage rates.
When investors sell bonds, yields rise, which often results in higher mortgage rates.
This relationship explains why mortgage rates can move independently of Federal Reserve actions.
The U.S. government finances its operations by issuing Treasury bonds, notes, and bills. These securities are sold to investors around the world and are considered among the safest investments available.
Treasury yields form a baseline for many interest rates across the economy. Mortgage-backed securities must compete with Treasury bonds for investor capital, so changes in Treasury yields often influence mortgage rates as well.
Investor demand, inflation expectations, and global market conditions all play a role in where those yields settle.
Because mortgage rates are market-driven, they can change quickly in response to economic data, shifts in investor sentiment, or broader global events.
Understanding how rates work helps explain why timing, structure, and flexibility matter when evaluating financing options.