2.4 Bond Features and Risks
Key Takeaways
- Callable bonds benefit issuers and create call and reinvestment risk for investors.
- Put provisions benefit investors and reduce downside price risk.
- Sinking funds reduce default risk but add refunding risk.
- Bond risks include interest rate, credit, inflation, and liquidity risk.
- Callable bonds generally pay higher coupons; putable bonds pay lower coupons.
Call Provisions
A call provision lets the issuer redeem a bond before maturity at a set price. Issuers call when rates fall — they retire high-coupon debt and refinance cheaper, exactly like refinancing a mortgage.
| Term | Definition |
|---|---|
| Call price | Price paid to redeem (par + call premium) |
| Call premium | Amount above par (often one year's interest) |
| Call protection | Years during which the bond cannot be called |
| Call date | First date the issuer may call |
Example: A bond with 5-year call protection cannot be called for 5 years; afterward the issuer may redeem at $1,050 (par + $50 premium). Calls hurt investors: they lose a high-yielding holding, must reinvest at lower rates, and the call price caps upside. To compensate, callable bonds carry higher coupons than otherwise-identical non-callable bonds. Call risk is greatest for premium bonds.
Put Provisions
A put provision lets the bondholder sell the bond back to the issuer at par before maturity. It protects investors when rates rise: put the bond back at par and reinvest at higher rates, which limits downside price risk. Because the feature favors the investor, putable bonds carry lower coupons. Call benefits the issuer; put benefits the investor — a guaranteed exam contrast.
Sinking Fund Provisions
A sinking fund requires the issuer to set aside money to retire part of the issue periodically. The issuer either buys bonds in the open market (when they trade below par) or calls them by lottery at par (when above par). Sinking funds reduce default risk because debt is repaid gradually, but they create refunding/call risk for the holder whose bond may be retired early.
The Six Core Bond Risks
Interest Rate Risk
The risk that rising rates lower a bond's market value. Longer maturity and lower coupon both increase sensitivity; duration quantifies it. A 20-year 4% bond is far more volatile than a 5-year 8% bond.
| Factor | Effect on interest rate risk |
|---|---|
| Longer maturity | Higher |
| Lower coupon | Higher |
| Lower yield | Higher |
Credit (Default) Risk
The risk the issuer misses interest or principal. The credit spread — a corporate yield minus a comparable Treasury yield — widens as perceived risk rises. Treasuries are considered free of credit risk.
Reinvestment Risk
The risk that coupons or returned principal cannot be reinvested at the original rate. Highest when rates are falling, coupons are high, and bonds are callable or have sinking funds. Zero-coupon bonds have no reinvestment risk because there are no interim coupons to reinvest — a favorite exam point.
Call Risk
A form of reinvestment risk specific to callable bonds: the investor gets principal back early and must reinvest at lower rates, losing remaining scheduled interest. Greatest for premium bonds when rates drop.
Inflation (Purchasing Power) Risk
The risk that inflation erodes the real value of fixed payments. Worst for long-term, fixed-rate bonds. Treasury Inflation-Protected Securities (TIPS) hedge this by adjusting principal with the Consumer Price Index, so both the inflation-adjusted principal and the semiannual coupon (a fixed rate on rising principal) grow with inflation.
Liquidity (Marketability) Risk
The risk of not selling quickly at a fair price. Treasuries and large, recent corporate issues are highly liquid; small municipal and high-yield issues are less so. Thin markets force a seller to accept a lower price or wait, widening the bid-ask spread the client effectively pays.
Legislative, Political, and Currency Risk
The exam also recognizes secondary risks worth naming. Legislative risk is the chance that a change in law — for example, a cut to a municipal bond's tax exemption — reduces a bond's value. Political (sovereign) risk applies to foreign government bonds whose value can fall with instability. Currency (exchange-rate) risk affects bonds denominated in a foreign currency: even a sound issuer can disappoint a U.S. investor if the foreign currency weakens against the dollar. These rarely dominate a question but appear as distractors and in suitability scenarios for international holdings.
Matching Features and Risks to the Client
The practical skill the exam rewards is connecting a feature to the risk it creates and then to a suitable client. A retiree seeking dependable income dislikes call risk, so a non-callable or putable bond suits her better than a premium callable bond that may be redeemed just as rates fall. An investor worried about inflation over a long horizon is steered toward TIPS. An investor who needs to liquidate on short notice should avoid thinly traded high-yield or small municipal issues. Tie each recommendation back to the client's objective, time horizon, and risk tolerance — the recurring logic behind nearly every features-and-risks question.
Risk Summary
| Risk | Definition | Driven by |
|---|---|---|
| Interest rate | Price falls when rates rise | Maturity, coupon |
| Credit/default | Issuer fails to pay | Issuer financial health |
| Reinvestment | Cannot reinvest at same rate | Falling rates, high coupon |
| Call | Bond called early | Falling rates, callable bonds |
| Inflation | Purchasing power erosion | Fixed payments, long maturity |
| Liquidity | Hard to sell at fair price | Issue size, market depth |
On the Exam
Know who each feature benefits (call = issuer, put = investor), that call risk is a form of reinvestment risk concentrated in premium bonds, that zero-coupon bonds eliminate reinvestment risk, that TIPS hedge inflation, and that longer maturity plus lower coupon maximize interest rate risk.
Call provisions in a bond primarily benefit:
Which type of bond has NO reinvestment risk?
Which bond would have the GREATEST interest rate risk?
A sinking fund provision requires the issuer to: