What is the Yield Curve? Definition, Formula, and Example
The yield curve is a graph of U.S. Treasury yields plotted against their maturities from 3 months to 30 years, with its slope — normal, flat, or inverted — serving as a leading indicator of economic expectations and Fed policy direction.
What is the Yield Curve?
The yield curve plots the yields on U.S. Treasury securities against their time to maturity — from 3-month T-bills to 30-year bonds. Its shape encodes the bond market's collective forecast for growth, inflation, and Federal Reserve policy. A normal curve slopes upward: investors demand higher yields for locking up capital longer. An inverted curve — where short-term rates exceed long-term rates — signals that the bond market expects the Fed to cut rates aggressively in the future, a condition historically associated with recessions. The yield curve is not a trading indicator in the technical sense; it is a macro regime signal that shifts sector rotation, duration positioning, and risk appetite across asset classes.
Key Spreads and How They're Measured
The most-watched metric is the 2s10s spread: the 10-year Treasury yield minus the 2-year Treasury yield.
2s10s Spread = 10-Year Yield − 2-Year Yield
| Spread Value | Curve Shape | Market Interpretation |
|---|---|---|
| > +100 bps | Steep | Strong growth expectations, risk-on |
| +1 to +100 bps | Normal | Standard economic expansion |
| −10 to +10 bps | Flat | Transition — Fed near peak or trough |
| < 0 bps | Inverted | Recession signal; expect Fed cuts |
The 3-month/10-year spread is preferred by some Federal Reserve researchers (notably the New York Fed) as a more reliable recession predictor, because the 3-month rate tracks the current Fed funds rate more tightly than the 2-year.
Worked Example: April 2026
As of April 2026, the U.S. Treasury curve has normalized after the deep inversion of 2022–2024:
| Maturity | Yield |
|---|---|
| 3-Month | 4.15% |
| 2-Year | 3.92% |
| 5-Year | 4.10% |
| 10-Year | 4.38% |
| 30-Year | 4.62% |
2s10s spread = 4.38% − 3.92% = +46 basis points → normal, upward-sloping curve.
Compare to July 2023, when the 2-year yielded 5.05% and the 10-year yielded 3.97% — a 2s10s of −108 bps, one of the deepest inversions in 40 years. That inversion persisted for over two years before normalizing, while recession timing remained contested.
When Traders Use the Yield Curve
The yield curve informs two layers of decision-making. At the macro positioning level: an inverted curve is a signal to reduce equity duration (growth and speculative names hit hardest if rates stay high), rotate into defensive sectors (utilities, consumer staples, healthcare), and reduce overall risk exposure. A steepening curve from inversion back to normal historically marks the early cycle — a period favorable for cyclicals, financials, and small caps. At the sector level: bank profitability is directly tied to the spread between short borrowing costs and long lending rates. A steep curve widens net interest margins; an inverted curve compresses them. JPM, BAC, and regional banks trade in close correlation with the 2s10s spread.
Limitations and Misconceptions
The yield curve predicts direction but not timing, and false positives are not rare. The 2022–2024 inversion preceded elevated recession risk that took over two years to resolve — investors who positioned defensively in mid-2022 missed a significant equity rally. The curve is also distortable: Federal Reserve quantitative easing suppresses long-end yields artificially, flattening the curve mechanically without reflecting true market expectations. Yield curve control (as practiced by Japan 2016–2024) makes the signal entirely useless. Finally, the 2s10s spread re-steepens in two distinct ways — "bull steepening" (short rates fall as Fed cuts) and "bear steepening" (long rates rise on inflation fears) — and these have opposite implications for equities and credit.