What it means
Governments issue sovereign bonds to cover the gap between what they spend and what they raise in tax, and to refinance older debt that is due. Buyers include banks, pension funds, insurers, companies and individual savers.
Each bond has a face value (the amount repaid at maturity), a coupon (the fixed interest paid, normally yearly or twice a year) and a maturity date. Prices of bonds already issued move up and down in the market, so the return an investor earns depends on the price paid.
The credit quality of the issuer matters enormously. Bonds from stable governments borrowing in their own currency are often treated as the safest investments in that currency, while bonds from countries with weak finances pay higher interest to compensate for the risk of default (failure to repay).
Currency adds another layer of risk. A government that borrows in a foreign currency, such as dollars, must earn or buy that currency to repay, which makes debt harder to manage if its own currency falls.
Investors therefore look closely at the currency a bond is issued in. Businesses care about sovereign bonds because they set the benchmark for other borrowing.
Corporate loan rates, mortgage rates and valuation models usually start from the sovereign bond yield and then add a margin for extra risk. A bond's market price and its yield move in opposite directions.
When interest rates rise, existing bonds lose value because new bonds pay more, and when rates fall, existing bonds gain value.
In practice
Real-world examples.
Example
A pension fund needs steady income to pay retirees and buys $20,000,000 of ten-year government bonds. The coupons arrive on fixed dates, which lets the fund match them against its monthly pension payments. The fund accepts a modest return in exchange for dependable payments.
Example
A multinational company parks spare cash of $5,000,000 in short-term government bonds rather than leaving it in a single bank. The treasurer accepts a lower interest rate in return for lower risk and easy sale if cash is needed quickly. The bonds mature within a year, so there is little time for prices to swing.
Example
A small business owner takes out a fixed-rate loan, and the bank prices it at the government ten-year bond yield plus 3%. When the bond yield rises one percentage point, the bank's new loans cost the owner more as well. The owner decides to borrow now rather than wait for a further rise.
Formula
Calculation
Annual coupon = face value x coupon rate
Current yield = annual coupon / current market price
An investor buys a government bond with a face value of $1,000 and a 4% coupon. The annual coupon is 1,000 x 4% = $40. The bond is trading at $950 in the market, so the current yield is 40 / 950 = 4.21% (rounded). If the investor holds it to maturity, the bond is repaid at $1,000, so they also gain the $50 difference between the price paid and the face value. Adding that gain to the coupon gives a fuller measure called yield to maturity, which is higher than the 4.21% current yield.Case study
Seen in the real world.
Valdoria is an illustrative, fictional country that borrowed $2,000,000,000 by issuing a ten-year sovereign bond at a 5% coupon. Annual interest was therefore 2,000,000,000 x 5% = $100,000,000, paid from tax revenue.
Two years later, investors worried about the government's budget deficit and sold the bonds, so the price fell and the yield rose to 8%. The government had to pay higher rates on any new borrowing, which raised its interest bill and left less money for hospitals and roads.
The illustrative finance ministry responded by publishing a clearer plan to reduce its deficit and by extending the maturity of its debt. Over the next year confidence returned, the yield eased, and new bonds could be issued at lower cost. The ministry also began publishing its borrowing calendar so that investors knew what to expect.
Watch out
Common mistakes.
- Assuming all sovereign bonds are risk-free, when governments can and do default or restructure their debt.
- Ignoring currency risk when buying bonds issued in a foreign currency, which can wipe out the interest earned, particularly on bonds from countries with volatile exchange rates.
- Believing that a bond's price stays at face value, when market prices rise and fall with interest rates and credit perceptions.
Questions
People also ask.
Who buys sovereign bonds?
Banks, pension funds, insurers, companies, central banks and individuals all buy them for safety, income or to meet regulatory requirements.
What happens if a government cannot repay?
It may negotiate new terms, extend the maturity, reduce what it owes or, in the worst case, default, which usually damages its ability to borrow later.
How do sovereign bonds differ from corporate bonds?
A corporate bond depends on a company's profits and assets, while a sovereign bond depends on a government's taxing power and willingness to pay.
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