Treasury Yield Calculator
US Treasury securities use several yield conventions that can be confusing. This calculator computes discount yield, bond equivalent yield, and current yield so you can accurately evaluate government bond investments.
Understanding Treasury Yield Conventions
The US Treasury market uses several yield conventions that can confuse even experienced investors. Treasury bills, which mature in one year or less, are traditionally quoted on a discount yield basis using a 360-day year. This convention dates back to when calculations were done by hand and 360 was easier to divide. The discount yield understates the actual return because it divides the discount by the face value rather than the purchase price, and uses 360 days rather than 365. The bond equivalent yield corrects both of these issues, providing a yield figure that can be directly compared with coupon-bearing Treasury notes and bonds. For example, a T-bill with a 4.5% discount yield might have a bond equivalent yield of 4.65%. Understanding these conventions matters when comparing across security types and when evaluating the true return you can expect from short-term government securities in your portfolio.
The Treasury Yield Curve Explained
Treasury yields across different maturities form the yield curve, one of the most closely watched indicators in finance. A normal yield curve slopes upward, with longer maturities offering higher yields to compensate investors for the additional risk of locking up money for longer periods. A flat yield curve suggests the market expects economic slowdown, while an inverted curve, where short-term yields exceed long-term yields, has historically been a reliable recession predictor. The yield curve reflects market expectations about future interest rates, inflation, and economic growth. When the Federal Reserve raises short-term rates aggressively, the front end of the curve rises, potentially inverting the curve if long-term expectations remain anchored. Investors use the yield curve to decide where to position their bond portfolios: the steeper the curve, the more compensation you receive for extending maturity. A flat or inverted curve suggests staying shorter since you are not being adequately rewarded for the additional duration risk.
Treasuries in Portfolio Construction
US Treasury securities play a unique role in portfolio construction as the closest thing to a risk-free asset available. Their credit risk is considered negligible since they are backed by the full faith and credit of the US government. This makes them the ideal safe-haven asset during market stress. In the 2008 financial crisis and the 2020 pandemic crash, Treasury prices soared as investors fled risky assets. For asset allocation, short-term Treasuries serve as a cash alternative with slightly higher yields, while intermediate-term Treasuries provide the core of most bond allocations. Long-term Treasuries offer the most interest rate sensitivity and can act as portfolio insurance against deflationary recessions. Treasury Inflation-Protected Securities, or TIPS, provide explicit inflation protection. The optimal Treasury allocation depends on your investment horizon, risk tolerance, and views on interest rates and inflation. Most financial advisors recommend Treasuries comprise a significant portion of the fixed income allocation for their unmatched safety and liquidity.
Frequently Asked Questions
What is the discount yield on a Treasury bill?
The discount yield is calculated as (Face Value - Purchase Price) / Face Value times 360/days to maturity. This is the traditional quoting convention for T-bills. It uses a 360-day year and the face value as the base, which actually understates the true return compared to the bond equivalent yield.
What is bond equivalent yield?
Bond equivalent yield (BEY) converts the discount yield to a basis comparable with coupon-bearing bonds. It uses a 365-day year and the purchase price as the base, making it higher than the discount yield. BEY allows you to compare T-bill returns directly with Treasury notes and bonds.
Why do Treasuries have multiple yield measures?
Different yield measures serve different purposes and follow different conventions. Discount yield is the traditional dealer quoting convention for T-bills. Bond equivalent yield allows comparison with coupon bonds. Yield to maturity provides the most comprehensive return measure. Each convention has historical and practical reasons for existence.
Are Treasury yields taxed?
Treasury interest is subject to federal income tax but exempt from state and local income taxes. This state tax exemption makes Treasuries more attractive than similarly-yielding corporate bonds for investors in high-tax states. The tax-equivalent yield of a Treasury can be significantly higher than its stated yield.
How do Treasury yields affect other interest rates?
Treasury yields serve as the risk-free benchmark for the entire financial system. Mortgage rates, corporate bond yields, and savings rates all move in relation to Treasury yields. When the Federal Reserve raises or lowers the federal funds rate, it directly impacts short-term Treasury yields, which then ripple through to longer-term rates.