Definition
Default Risk
The risk that a bond issuer will fail to make required interest payments or repay principal at maturity. Default risk is measured by credit ratings from agencies like Standard & Poor's, Moody's, and Fitch, with higher-rated bonds (AAA) having lower default risk than lower-rated bonds (BB). Investors demand higher yields (default risk premium) to compensate for accepting greater default risk.
An investor compares three $10,000 bonds with 10-year maturities: U.S. Treasury yielding 3.5% (zero default risk), AAA-rated corporate bond yielding 4.2%, and BB-rated corporate bond yielding 7.8%. The higher yields on corporate bonds compensate for default risk. If the BB-rated company faces financial distress and defaults, the investor may lose principal and interest, while the Treasury bond is backed by the full faith and credit of the U.S. government.
Students often confuse default risk with interest rate risk (bond price changes due to market rate movements), believe all government bonds have zero default risk (only U.S. Treasuries; municipal bonds carry some default risk), or forget that higher yields indicate higher default risk, not better investments.
How is Default Risk tested on the exam?
- Identifying which securities have zero default risk (U.S. Treasury securities only)
- Ranking bonds by default risk based on credit ratings and issuer type
- Understanding the relationship between default risk and yield (risk-return tradeoff)
- Calculating yield spreads between corporate bonds and Treasury securities (credit spread)
- Determining appropriate bond investments for clients based on default risk tolerance
Regulatory limits
Regulatory Limits
| Description | Limit | Notes |
|---|---|---|
| U.S. Treasury securities default risk | Zero | Backed by full faith and credit of U.S. government; considered risk-free |
| Investment-grade threshold (lower default risk) | BBB-/Baa3 or higher | S&P/Fitch use BBB-, Moody's uses Baa3 as lowest investment-grade rating |
| High-yield threshold (higher default risk) | BB+/Ba1 or lower | Below investment-grade; also called junk bonds or speculative-grade |
Think of default risk like lending money to friends: Lending to your financially stable friend (AAA = low risk) means accepting lower interest, but lending to your unreliable friend (BB = high risk) means demanding much higher interest to compensate for the risk they won't pay you back. Uncle Sam (U.S. Treasuries) always pays back (zero default risk), but everyone else carries some risk. Higher yield = Higher default risk.
Practice questions
Test your understanding with the questions below. Pick an answer to reveal the explanation.
Elena, a 62-year-old retiree, holds a bond portfolio consisting of 40% U.S. Treasury bonds, 30% AAA-rated corporate bonds, and 30% BB-rated corporate bonds. She is concerned about preserving capital and asks which portion of her portfolio carries the highest default risk. What is the most accurate response?
C is correct. BB-rated corporate bonds are high-yield (junk) bonds with the highest default risk in Elena's portfolio. BB is below the investment-grade threshold (BBB-/Baa3), indicating speculative characteristics and elevated probability of default. These bonds would be inappropriate for a retiree prioritizing capital preservation.
A is incorrect because U.S. Treasury bonds have ZERO default risk regardless of maturity; they are backed by the full faith and credit of the U.S. government. Maturity affects interest rate risk, not default risk. B is incorrect because AAA-rated bonds have extremely low default risk (highest credit quality), though not zero like Treasuries. D is incorrect because default risk varies significantly across issuers and credit ratings; not all fixed-income securities carry equal default risk.
The Series 65 exam tests your ability to evaluate default risk across different bond types and credit ratings when making suitability recommendations. Understanding that U.S. Treasuries have zero default risk while corporate bonds carry varying levels of credit risk is fundamental to fixed-income portfolio construction.
Which of the following statements best describes how default risk is measured in the bond market?
B is correct. Default risk is measured by credit ratings assigned by rating agencies such as Standard & Poor's, Moody's, and Fitch. These agencies analyze the issuer's financial strength, debt levels, cash flow, and ability to meet obligations, assigning letter grades (AAA, AA, A, BBB, BB, etc.) that reflect default probability.
A is incorrect because maturity affects interest rate risk and reinvestment risk, not default risk. A 30-year Treasury bond has zero default risk despite its long maturity. C is incorrect because the coupon rate reflects prevailing interest rates at issuance and the issuer's credit quality at that time, but doesn't directly measure current default risk. D is incorrect because market price reflects multiple factors (interest rates, time to maturity, credit quality) and is not a direct measure of default risk alone.
The Series 65 exam tests understanding of credit rating systems as the primary measure of default risk. Advisers must interpret credit ratings when selecting bonds and explaining risk levels to clients, making this foundational knowledge critical.
An investment adviser is building a bond ladder for a client and is considering the following securities. Which list correctly ranks them from LOWEST to HIGHEST default risk?
B is correct. The ranking from lowest to highest default risk is: (1) U.S. Treasury bonds (zero default risk - backed by full faith and credit of U.S. government), (2) AAA corporate bonds (highest corporate credit rating, extremely low default risk), (3) A-rated municipal bonds (single-A rating indicates low but not minimal default risk), (4) BB corporate bonds (below investment-grade/high-yield bonds with significantly elevated default risk).
A incorrectly places A-rated municipals as lowest risk; only U.S. Treasuries have zero default risk. C incorrectly places AAA corporate bonds below Treasuries; no corporate bond has lower default risk than Treasuries. D reverses the entire order, incorrectly suggesting BB bonds have the lowest risk when they actually have the highest default risk among the options.
The Series 65 exam tests your ability to rank securities by default risk when constructing portfolios or answering client questions. Understanding that U.S. Treasuries are the only truly risk-free securities and that credit ratings indicate relative default risk is essential for portfolio management and suitability determinations.
All of the following statements about default risk are accurate EXCEPT
C is correct (the EXCEPT answer). Default risk CANNOT be completely eliminated through diversification. While diversification across multiple issuers reduces the impact of any single default (unsystematic risk reduction), it cannot eliminate default risk entirely. Only purchasing securities with zero default risk (U.S. Treasuries) eliminates this risk completely.
A is accurate: U.S. Treasury securities have zero default risk because they are backed by the full faith and credit of the U.S. government, which can print money to meet obligations. B is accurate: the risk-return tradeoff means higher-risk bonds must offer higher yields (default risk premium) to attract investors. D is accurate: municipal bonds have historically low default rates (backed by state/local taxing authority) but carry more default risk than Treasuries and less than corporate bonds.
The Series 65 exam tests understanding of the limits of diversification. While diversification is a powerful risk management tool, it cannot eliminate default risk from corporate or municipal bonds. Only U.S. Treasuries offer true freedom from default risk, a critical distinction for conservative portfolios.
An investment-grade corporate bond is downgraded from A to BBB-, remaining at the investment-grade threshold. Which of the following statements accurately describe potential effects of this downgrade?
1. The bond's default risk has increased
2. The bond's market price will likely increase
3. Investors will demand a higher yield to compensate for increased risk
4. The bond's coupon payment amount will change
A is correct. Statements 1 and 3 are accurate.
Statement 1 is TRUE: A downgrade from A to BBB- indicates deteriorating creditworthiness and increased probability of default. The rating agencies have assessed higher default risk, even though the bond remains investment-grade.
Statement 2 is FALSE: The bond's market price will likely DECREASE, not increase. Higher perceived default risk makes the bond less valuable, causing the price to fall in the secondary market. Investors will pay less for a riskier bond.
Statement 3 is TRUE: As the market price decreases, the yield increases (inverse relationship). Investors demand higher yields to compensate for the increased default risk reflected in the lower credit rating.
Statement 4 is FALSE: The coupon payment is fixed at issuance and does not change due to rating downgrades. The bond continues paying the same dollar amount of interest; only the market price and yield adjust to reflect the changed risk profile.
The Series 65 exam tests understanding of how credit rating changes affect bond valuations and investor returns. Credit downgrades increase default risk, causing price declines and yield increases, but do not affect the fixed coupon payments. This relationship is fundamental to fixed-income analysis and portfolio management.
What concepts relate to Default Risk?
This term is part of this cluster :
Where does Default Risk appear on the Series 65 exam?
This term is tested in the following Series 65 exam topics: