Yield curve

What the yield curve means

The yield curve is a line that plots the interest rates, or yields, that a government pays to borrow for different lengths of time. On the horizontal axis are maturities, from a few months through two, five, ten and up to thirty years. On the vertical axis is the yield for each maturity. Joining the points gives a curve that summarises how the market prices time and risk in the bond market.

Most often the term refers to government bonds of a single country, such as US Treasuries, German Bunds or UK gilts, because they are considered the benchmark for low credit risk in that currency, though they still carry price risk. Each country has its own curve, and curves also exist for swaps and corporate debt.

Economists, central banks, bond investors and currency traders watch the curve because it condenses expectations about future interest rates, inflation and growth into one picture. It also underlies pricing for mortgages, corporate loans and other rates, so its shape feeds through to the wider economy.

How it works

Yields on bonds of different maturities are set by supply and demand in the market, but they reflect three main ingredients.

• Expected path of short-term policy rates. If investors expect the central bank to raise rates, longer yields tend to rise to reflect the average of future short rates.
• Inflation expectations. Lenders want compensation for losing purchasing power over the life of the bond.
• Term premium. Extra yield that investors may demand for the risk of locking money for a long time, or that may be squeezed down when demand for long bonds is strong.

The shape of the curve is described in a few ways.

1. Normal or upward sloping. Longer maturities yield more than shorter ones. This is the usual state and reflects the term premium and expectations of steady growth.
2. Flat. Short and long yields are close, often seen at turning points.
3. Inverted. Short-term yields are above long-term yields. This usually reflects expectations that rates will fall in future, often because growth is expected to slow, or because the central bank has pushed short rates up to fight inflation.
4. Steepening or flattening. Describes the change in the gap between two maturities, such as the ten-year minus two-year spread.

Bond prices and yields move in opposite directions: when yields rise, the price of an existing bond falls.

A worked example

These numbers are illustrative. Assume a government curve shows the following yields.

• 3 months 4.60%
• 2 years 4.20%
• 5 years 3.90%
• 10 years 3.85%
• 30 years 4.05%

The 10-year minus 2-year spread = 3.85% minus 4.20% = minus 0.35 percentage points, which is negative. This part of the curve is inverted. The 30-year minus 10-year spread = 4.05% minus 3.85% = plus 0.20, which is positive.

Interpretation. The market is pricing short-term rates above long-term rates, which is consistent with expectations that policy rates will eventually be lowered. If a year later the 2-year yield had dropped to 3.60% and the 10-year stayed at 3.85%, the spread would be plus 0.25, and the curve would have steepened at that point.

Price effect. A bond with a duration of about 7 years loses roughly 7% of its price for each 1 percentage point rise in yield, so a 0.25 point rise implies roughly a 1.75% price fall.

Why it matters

The curve is one of the most watched macro indicators. Historically, an inverted curve has often preceded economic slowdowns, though the timing varies widely and it has not been a reliable timing tool. It is a signal about market expectations, not a cause of recession by itself.

For traders, the curve links to several markets. Changes in yield differences between countries influence currency pairs, because capital seeks higher returns, which relates to carry trade strategies. Equity sectors react differently too. Banks, for example, often earn from the gap between short-term funding costs and long-term lending rates, so curve shape can affect their profits.

For investors in bond funds and ETFs, the curve shows where interest-rate risk lies. Long-maturity funds react more strongly to yield changes than short-maturity funds.

How to use it in practice

1. Look at published curves from the central bank or the national debt office, and note their update frequency.
2. Track key spreads, for instance 10-year minus 2-year and 10-year minus 3-month, rather than a single yield.
3. Compare curves across countries when assessing currency pairs and think about the interest-rate differential.
4. Read it together with central bank communications, inflation data and growth indicators.
5. For bond ETFs or funds, check the average maturity and duration to see how sensitive they are to curve moves.
6. Watch both the level and the change in the curve, as steepening and flattening convey different stories.
7. Use the economic calendar to see which releases tend to move yields.

Common mistakes and misconceptions

• Treating inversion as a precise recession timer. The lag has varied and false alarms exist.
• Thinking the curve is set by the central bank alone. The central bank anchors the short end, but the long end is set by the market.
• Mixing up yields and prices. Rising yields mean falling bond prices.
• Looking at only one maturity. The relationships between maturities carry the information.
• Assuming a steeper curve is always good. It can reflect rising inflation fears or heavy bond issuance.
• Forgetting differences between countries, since each curve responds to local conditions.

Risks and limitations

The curve reflects market expectations that can change quickly and prove wrong. Yields are influenced by central bank bond buying, regulatory demand for safe assets and global capital flows, which can distort the usual signals. An inverted or steepening curve is not a trading signal, and no pattern guarantees a particular outcome for stocks, currencies or the economy. Bond prices can fall sharply when yields rise, and leveraged trading of rates products carries a high risk of rapid loss.

How Brokeli looks at it

For our research the yield curve is background context rather than a broker feature. It matters when we check which instruments a broker offers, such as bond ETFs or rate-sensitive CFDs, and when we look at swap or financing charges that are linked to interest-rate levels. We record those published charges and instrument lists, and leave interpretation of macro conditions to the reader.