Certificates of Deposit

What Are Certificates of Deposit?

Certificates of deposit (CDs) are time deposit instruments offered by banks and credit unions that pay a fixed interest rate in exchange for the depositor committing funds for a specified term. Terms range from as short as one month to as long as 10 years, with the most common being 3 months to 5 years. CDs are FDIC insured up to $250,000 and are among the safest investment vehicles available.

CDs serve a dual purpose in the financial system: they provide savers with a guaranteed return above savings account rates, and they provide banks with a stable, predictable source of funding that does not fluctuate with daily deposit flows.

Why It Matters for Markets

CD rates and flows are important indicators of bank funding conditions and interest rate expectations. When banks need to attract stable deposits, they raise CD rates, which can signal funding pressure or aggressive growth plans. When CD rates are significantly above savings rates, it incentivizes depositors to lock up funds, providing banks with more predictable funding.

The massive surge in CD purchases during 2023-2024, as rates rose above 5%, represented a significant shift in how households allocated their savings. This "Great CD Migration" moved trillions from low-yielding savings accounts and money market funds into time deposits, affecting bank funding dynamics and consumer behavior. As these CDs mature, the reinvestment decisions will affect deposit flows across the banking system.

For the broader economy, CDs represent deferred consumption. Money locked in a CD is money not being spent on goods and services, which can have a modestly deflationary effect. Conversely, when large volumes of CDs mature and holders choose not to renew (perhaps because rates have fallen), the released funds can flow into spending or other investments.

CD Strategies

CD laddering, buying CDs with staggered maturity dates, is the most popular strategy. It provides regular access to maturing funds while maintaining the higher rates of longer-term CDs. A 5-year ladder with annual rungs ensures that one-fifth of the portfolio matures each year.

No-penalty CDs offer lower rates but allow early withdrawal without fees, providing more flexibility. Jumbo CDs (typically $100,000+) may offer premium rates. Bump-up CDs allow one rate increase during the term if rates rise. Each structure involves trade-offs between rate, flexibility, and terms that investors should evaluate based on their specific needs and interest rate outlook.