Portfolio Management Pathway · Fixed-Income Active Management: Credit Strategies

Credit Strategies Overview and Credit Spread Basics for CFA Level 3

Updated 8 October 2026 · Fact-checked

A credit spread is the extra yield a credit bond offers over a benchmark bond of similar maturity. It pays for expected default loss, the risk that losses exceed expectations, and illiquidity. To solve questions, split the spread into these parts, then link a change in spread to the driver that moved.

Understand Credit Strategies Overview and Credit Spread Basics

A credit spread is the yield a corporate bond pays above a benchmark, usually a government bond or swap rate of similar maturity. You hold the bond because you want that extra yield. The question is what the extra yield pays you for.

The spread has three broad components. First, expected loss, which is the probability of default times the loss given default. Second, a credit risk premium for the chance that actual losses are worse than expected, and for the uncertainty in those losses. Third, a liquidity premium, because credit bonds trade less easily than government bonds and have wider bid-ask spreads.

The market is split in two. Investment grade (IG) bonds are rated BBB-/Baa3 or higher. They have lower default risk, tighter spreads, and their returns are driven mostly by interest rates and by spread moves. High yield (HY) bonds are rated below that. They have wider spreads, higher default risk, and behave more like equities. Their returns depend heavily on default, recovery and the economic cycle.

Spreads change for several reasons. A change in the issuer's credit quality (upgrade, downgrade, or better or worse earnings) moves the spread for that issuer. A change in market conditions moves spreads for many issuers at once. In a weak economy or a risk-off market, investors demand more compensation and spreads widen. In a strong economy, spreads tighten. Liquidity matters too. When trading dries up, spreads widen even if default expectations have not changed. Supply of new bonds and investor demand also push spreads around.

For an active manager, the aim is to earn return from spread changes and carry, not just from rates. Spread widening cuts the price of a bond. The effect is roughly the spread change times the spread duration, with the sign reversed. Your job in the exam is to tie each view on spreads to a portfolio action that fits the client's objectives and constraints.

Key rules to remember

Credit spread: Credit spread = Yield on credit bond − Yield on benchmark of similar maturity; Benchmark may be a government bond or a swap rate. Use the benchmark the question names.
Expected loss: Expected loss = Probability of default × Loss given default; Loss given default = 1 − recovery rate, expressed as a share of exposure.
Spread components: Spread ≈ Expected loss + Credit risk premium + Liquidity premium; A conceptual breakdown. Exam questions usually ask you to identify which part changed.
Price impact of spread change: %ΔPrice ≈ −Spread duration × ΔSpread; An approximation for small changes. Express ΔSpread in decimal form, so 25 bps = 0.0025.
Excess spread return: Excess spread return ≈ Spread × Time − Spread duration × ΔSpread − Expected loss; Carry from the spread, minus the price loss from widening, minus expected credit loss. Use the same period for all terms.

How to solve Credit Strategies Overview and Credit Spread Basics questions

Use this method for any question on credit spreads, IG versus HY, or spread drivers. Tie your answer to the client's needs.

1Read the command word and the client details. Note the return objective, risk tolerance and constraints, such as liquidity needs or rating limits.
2Identify whether the question is about one issuer or the whole market. Issuer-specific points point to credit quality. Market-wide points point to the economy, risk appetite and liquidity.
3Split the spread into expected loss, credit risk premium and liquidity premium. Decide which part the facts affect.
4State the direction: wider or tighter spread. Link it to the driver, for example weaker growth leads to a higher risk premium and wider spreads.
5If a calculation is asked, convert bps to decimals, apply the formula, and show the sign. Spread widening lowers price.
6Compare IG and HY if relevant. HY has higher default sensitivity and equity-like behaviour. IG is more driven by rates and spreads.
7Give your recommendation and one short reason tied to the client's constraints. Stop once you have earned the points.

Quickest way: Driver-to-direction shortcut

When to use it: Use this for item set questions asking what happens to spreads or which bond fits a view.

Ask: is this one issuer or the market?
Match the driver: weaker credit, weaker economy, lower liquidity or lower demand means wider spreads. The opposites mean tighter spreads.
Wider spread means a price fall, and a bigger fall for higher spread duration and for lower-quality bonds.
Pick the option that matches both the direction and the size of the effect.
Eliminate options that confuse rate moves with spread moves.

Common mistakes in Credit Strategies Overview and Credit Spread Basics

Treating the whole spread as compensation for default only.
Students focus on default risk because it is the headline credit risk.
Fix: Always list expected loss, risk premium and liquidity premium. Spreads are usually larger than expected loss alone.
Saying spreads tighten when the economy weakens.
Students mix up the effect of rate cuts with the effect on credit risk.
Fix: Weak economy raises default risk and risk aversion, so spreads widen. Keep rate moves and spread moves separate.
Getting the sign wrong in the price impact formula.
The formula has a minus sign and students drop it.
Fix: Widening spreads always lower price. Write the negative sign first, then check your answer is a loss.
Entering bps as whole numbers in the formula.
Spreads are quoted in bps, such as 40, and students multiply directly.
Fix: Convert 40 bps to 0.0040 before multiplying by spread duration.
Assuming HY and IG react the same way to market stress.
Both are called credit, so students treat them alike.
Fix: HY spreads usually widen more in stress and HY returns correlate more with equities. IG is more sensitive to rates.
Ignoring liquidity as a separate driver.
Students assume spread changes need a change in credit quality.
Fix: Spreads can widen from falling liquidity or heavy selling alone. Check if the vignette mentions trading, bid-ask spreads or fund outflows.

Worked examples

Example 1

A portfolio holds a corporate bond with a spread duration of 5.0. The credit spread widens from 150 bps to 190 bps. Estimate the percentage price change from the spread move alone.

Show the solution

Find the spread change: 190 − 150 = 40 bps = 0.0040.
Apply the formula: %ΔPrice ≈ −Spread duration × ΔSpread.
Calculate: −5.0 × 0.0040 = −0.020.
Convert to a percentage: −2.0%.

Answer: The price falls by about 2.0% due to the spread widening.

Example 2

A bond has a probability of default of 2.0% a year and a recovery rate of 40%. Its credit spread is 220 bps. Calculate the expected loss and the part of the spread that is not expected loss. Then explain what that remainder pays for.

Show the solution

Loss given default = 1 − 0.40 = 60%.
Expected loss = 2.0% × 60% = 1.2%, which is 120 bps.
Remainder = 220 − 120 = 100 bps.
Explain: the remaining 100 bps compensates for the credit risk premium, meaning the risk that losses exceed expectations, and for the liquidity premium.

Answer: Expected loss is 120 bps. The other 100 bps pays for the credit risk premium and the liquidity premium.

Exam tips

Read command words closely. If asked to explain, give the driver and the direction. If asked to calculate, show the formula and the number.
Convert bps to decimals before you multiply. Show this step so you keep credit if you slip later.
Tie IG versus HY choices to the client's risk tolerance, liquidity needs and any rating limits in the policy.
When stress appears in a vignette, expect spreads to widen, HY to fall more than IG, and liquidity to worsen.
Separate rate effects from spread effects in return questions. Most traps live in that gap.

Credit Strategies Overview and Credit Spread Basics in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Credit Strategies Overview and Credit Spread Basics: frequently asked questions

What are the components of a credit spread?

A credit spread compensates for expected loss from default, a credit risk premium for the chance losses are worse than expected, and a liquidity premium. In the exam, state which component your facts affect.

What drives credit spread changes?

Changes in an issuer's credit quality move that issuer's spread. Economic conditions, investor risk appetite, liquidity and the supply of and demand for bonds move spreads across the market. Weak conditions widen spreads and strong conditions tighten them.

How do investment grade and high yield differ for portfolio management?

IG bonds have lower default risk and tighter spreads, and their returns depend more on rates and spread changes. HY bonds have wider spreads and higher default risk, and they behave more like equities. Choose between them based on the client's risk tolerance and constraints.

Does a wider spread always mean a better investment?

No. A wider spread may reflect higher expected loss or higher risk, not a bargain. Compare the spread to expected loss and the risk premium you are being paid before deciding.