What Is a Bond Yield? How Yields Work and Why They Move
In this article
A bond yield measures the return an investor earns or expects to earn from a bond, usually expressed as an annual percentage. For fixed-rate bonds, yields generally move inversely to prices: when market prices rise, yields fall, and when prices fall, yields rise.
A bond yield is the return an investor earns or expects to earn from a bond, usually expressed as an annual percentage. Depending on the measure used, it can reflect the bond's coupon, its current market price or the return implied by holding it to maturity.
Governments and companies issue bonds to raise capital and usually make interest payments to bondholders. Understanding how yields respond to interest rates, inflation expectations and changing market conditions can help traders assess fixed-income markets and related derivatives.
Quick Takeaways
- Bond yield describes the return generated or implied by a debt security, usually expressed as an annual percentage.
- For conventional fixed-rate bonds, prices and yields move in opposite directions when other factors remain unchanged.
- Nominal yield is based on the bond's fixed coupon and face value, while current yield changes as the market price moves.
- Central bank policy and expectations about future interest rates can influence government bond yields, although longer-term yields also reflect factors such as term premia.
- Some derivatives, including CFDs linked to government bond markets, allow traders to speculate on bond price movements without owning the underlying bond.
Bond Yield Meaning: Nominal, Current and YTM
To understand bond yields, it helps to distinguish between the terms fixed when a bond is issued and the yield measures that change as the bond trades in the secondary market.
A conventional fixed-rate bond has a face value, also known as par value, and pays a set amount of interest known as the coupon.
- Nominal Yield (Coupon Rate): The annual coupon payment expressed as a percentage of the bond's face value. For example, a bond with a $1,000 face value that pays $50 a year has a nominal yield of 5%.
- Current Yield: The annual coupon payment divided by the bond's current market price. Because the market price can rise or fall, the current yield also changes.
- Yield to Maturity (YTM): A measure of the annualised return implied by the bond's current price if it is held until maturity and the issuer makes the scheduled payments. It takes account of future coupon payments, the time remaining to maturity and the difference between the purchase price and the amount repaid at maturity.
Bond Yield Explained: The Inverse Price Relationship
For conventional fixed-rate bonds, price and yield move in opposite directions. If demand for a bond increases and its market price rises, its current yield falls. If its price falls, its current yield rises, assuming the coupon payment remains unchanged.
Consider a simple example. Suppose a bond has a face value of $1,000 and pays a fixed annual coupon of $50. When the bond trades at its $1,000 face value, its current yield is 5%.
If market interest rates rise and newly issued bonds offer higher returns, the older bond may become less attractive at its existing price. Its market price may therefore fall.
If the bond falls to $900:
Current Yield = Annual Coupon Payment ÷ Market Price
Current Yield = $50 ÷ $900 = 5.56%
If market interest rates fall and stronger demand pushes the bond price up to $1,100:
Current Yield = $50 ÷ $1,100 = 4.55%
The coupon has not changed in either example. The yield changes because the price investors are willing to pay for the fixed stream of payments has changed.
The US 10-year Treasury yield is also widely followed as a macroeconomic reference point. Changes in the yield can reflect shifts in expectations for monetary policy, inflation and interest-rate risk. However, the yield itself is not a direct measure of Treasury market liquidity. Liquidity is more commonly assessed using measures such as bid–ask spreads, market depth and the price impact of trades.
What Moves Bond Yields?
Bond yields respond to a range of economic, policy and market factors. The effect of any one factor can vary depending on what investors have already priced in.
Factor | How It Affects Bonds | Potential Effect on Yields |
|---|---|---|
Central Bank Policy | Policy rates and expectations about future rate decisions affect borrowing costs and the expected path of short-term interest rates. | Expectations of higher rates can push yields higher, although the effect varies across maturities. |
Inflation Expectations | Inflation reduces the purchasing power of fixed future payments. | Higher expected inflation can lead investors to demand higher nominal yields. |
Credit Risk and Ratings | Investors assess the likelihood that an issuer will meet its interest and principal payments. | Higher perceived credit risk generally leads investors to demand a higher yield, often putting downward pressure on the bond's price. |
Economic Growth | Changes in the growth outlook can affect inflation expectations, monetary policy expectations and demand for safer assets. | Stronger growth can contribute to higher yields, while weaker growth can put downward pressure on yields, but the relationship is not automatic. |
Central bank decisions are particularly important, but they do not determine longer-term government bond yields on their own. For example, US long-term Treasury yields reflect expectations for future short-term interest rates as well as a term premium for holding longer-duration debt.
What Does Bond Yield Mean for CFD Traders?
Traders do not need to own government bonds directly to gain exposure to movements in some fixed-income markets. Certain Contract for Difference (CFD) products provide exposure to government bond benchmarks or bond futures without giving the trader ownership of the underlying asset.
Where a CFD is linked to a government bond futures contract, changes in the underlying futures price affect the value of the CFD position. Bond futures prices generally move in the opposite direction to yields, so changes in interest-rate expectations or inflation data can influence both markets.
A trader who expects the underlying bond price to rise may take a long position, while one who expects it to fall may take a short position. However, the exact pricing method and reference market depend on the CFD provider and product specification.
CFDs are traded on margin, which means traders can gain exposure to a larger position by providing a smaller initial deposit. Leverage can increase both potential gains and potential losses. Financing, overnight or rollover charges may also apply when positions remain open, depending on the product and provider.
CFDs are complex, high-risk products. The UK's Financial Conduct Authority (FCA) has previously stated that approximately 80% of customers lose money when investing in CFDs. In the UK, firms offering CFDs to retail clients are required to display an up-to-date, provider-specific percentage showing how many retail accounts lose money. That percentage is calculated every three months using data from the preceding 12 months.
You should understand how leverage, margin requirements, market volatility and trading costs can affect an open position before you put capital at risk.
Conclusion
Understanding what is a bond yield helps investors and traders assess the return available from a bond and how the market is pricing interest rates, inflation and risk. For conventional fixed-rate bonds, rising prices generally mean falling yields, while falling prices mean rising yields.
Watching government bond yields can also provide useful context for changes in monetary policy expectations and wider financial conditions. For traders using derivatives, understanding the relationship between bond prices and yields is particularly important because leveraged exposure can magnify the financial impact of relatively small market movements.
A clear understanding of CFD trading can also help explain how margin, leverage, financing costs and underlying market prices affect derivative positions.
Trading leveraged products involves substantial financial risk. Market movements can lead to rapid losses, and CFDs may not be suitable for every retail trader.
FAQ
What Happens to a Bond Yield When Bond Prices Rise?
For a conventional fixed-rate bond, its yield falls when its market price rises, assuming other factors remain unchanged. The bond's coupon payment stays fixed, so paying a higher price reduces the return relative to that price.
What Is the Difference Between a Coupon Rate and a Bond Yield?
The coupon rate is the fixed annual interest payment expressed as a percentage of the bond's face value. Bond yield measures the return based on factors such as the bond's current market price. For example, current yield changes as the market price moves, while Yield to Maturity (YTM) also accounts for coupon payments, time to maturity and the amount repaid at maturity.
Why Can Central Bank Rate Hikes Cause Bond Yields to Rise?
Higher central bank policy rates can push bond yields higher by increasing market expectations for interest rates. Newly issued bonds may then need to offer more competitive yields, making existing lower-yielding bonds less attractive. Their prices may fall as a result, which pushes their yields higher. The effect is not always the same across all maturities, as longer-term yields also reflect factors such as inflation expectations and the outlook for future interest rates.
Is a Higher Bond Yield Better for Investors?
Not necessarily. A higher yield may offer greater potential income or return, but it can also reflect lower bond prices or higher perceived risk. Investors should consider factors such as credit risk, inflation risk and interest-rate risk rather than assessing a bond on yield alone.
What Is Yield to Maturity (YTM)?
Yield to Maturity is the annualised return implied by a bond's current price if it is held until maturity and all scheduled payments are made. It takes account of future coupon payments, the time remaining to maturity and the difference between the purchase price and the amount repaid at maturity.
