“Bond yields rose” can sound like good news for everyone who owns bonds. Yet holders of existing fixed-rate bonds may see their market values fall during that same move. The apparent contradiction disappears once coupon, price and yield are separated.
Three numbers with different jobs
The coupon is the stated interest rate applied to a bond’s face value. The price is what someone pays to buy it. Yield measures return in relation to price and, depending on the measure, other promised cash flows.
TreasuryDirect explains that Treasury notes and bonds can trade above, at or below face value. Their prices depend on the relationship between their fixed interest rate and yield to maturity.
A hypothetical $1,000 bond
Imagine a bond with $1,000 face value and a 4% annual coupon. It pays $40 per year. At a $1,000 purchase price, its current yield is 4%. At $900, the same $40 payment represents approximately 4.44%. At $1,100, it represents about 3.64%.
This is a current-yield illustration: annual coupon divided by price. It is not a yield-to-maturity calculation, which also reflects the remaining cash flows and the difference between the purchase price and repayment at maturity.
Why existing prices react
The SEC explains that fixed-rate bond prices generally move opposite to market interest rates. A fixed payment becomes less competitive when comparable new bonds offer more, and more attractive when comparable new bonds offer less. Longer maturities generally carry greater interest-rate sensitivity than otherwise similar shorter maturities.
Compare like with like across markets
Before comparing a U.S. Treasury headline with a government bond abroad, write down the issuer, currency, maturity and type of yield. Comparing a two-year security with a ten-year security answers a different question from comparing two ten-year securities.
A research note might read: “Ten-year government bond, local-currency yield, observed at market close.” Adding the date and source makes the comparison reproducible. A single yield figure without these details is an incomplete description.
Separate an income plan from a sale price
For someone who needs to sell before maturity, a changing market price matters directly. For someone analyzing contractual payments, the payment schedule is a separate issue. Treating those questions separately makes bond headlines easier to interpret without turning every daily movement into an investment instruction.
Sources
- TreasuryDirect: Understanding Pricing and Interest Rates
- SEC Investor.gov: Fixed Income Investments and Interest Rates
Featured image: Peter Beke / Unsplash.
