Credit Risk

Credit risk — also called default risk — is the probability and impact of a borrower’s failure to pay principal or interest on a debt obligation. It is the primary risk borne by lenders, bondholders, and anyone with a counterparty on the other side of a contract.

The three components of credit risk

Regulators and risk managers break credit risk into three pieces, known as the “LGD–EAD–PD” framework:

1. Probability of Default (PD). The likelihood the borrower will fail to pay in full during a given period (typically one year). A triple-A rated company might have a PD of 0.01% per year; a high-yield speculative borrower might be 5% or higher. These estimates come from credit ratings, historical default data, or model-risk.

2. Exposure at Default (EAD). The total amount owed when the default occurs. For a bond, it is the face value plus accrued interest. For a loan, it may include undrawn revolving credit. For a derivative, it is the mark-to-market value plus potential future exposure.

3. Loss Given Default (LGD). What percentage of the exposure you actually lose. If you lend $100 to a borrower with a house worth $150, and the house is your collateral, your LGD might be 30% (losing $30), not 100%. LGD depends on seniority: senior secured lenders recover more than junior unsecured ones.

Expected loss = PD × EAD × LGD. A loan with a 1% chance of default on $1 million, with 40% recovery, generates an expected loss of 0.01 × $1,000,000 × 0.60 = $6,000 per year. Lenders price this into interest rates.

How credit risk varies across borrowers and time

Not all debt is equally risky. Governments that control their own currency (like the US) have very low default risk. Established companies rated investment-grade by the rating agencies have low-to-moderate risk. High-yield issuers — speculative or junk-rated firms — carry substantial risk.

Credit risk also moves with the economic cycle. During expansions, default rates fall because businesses profit and employment rises. During recessions, defaults spike. This procyclical nature means credit risk is not just about individual borrowers; it is about broader systemic-risk. A financial crisis can flip the entire credit market when seemingly safe borrowers suddenly look shaky.

The primary signal of credit risk is the credit spread — the extra yield a risky bond must offer to attract buyers. A Treasury bond yielding 4% and a corporate bond yielding 6% are separated by a 200 basis point spread. That gap compensates investors for counterparty-risk and default risk. When spreads widen, markets are pricing in higher default risk; when they narrow, risk appetite is rising.

Managing credit risk

For an individual investor, the main tools are simple:

• Diversification. Lend to many borrowers, not one.
• Seniority. Prefer senior secured debt over junior unsecured. If the borrower fails, senior creditors are paid first.
• Credit quality. Invest primarily in investment-grade bonds, especially if you cannot afford a loss.
• Collateral. A mortgage backed by a house, or a auto loan backed by a car, is safer than an unsecured personal loan.

For banks and hedge funds, risk management is more elaborate: they use value-at-risk, stress-testing, and scenario-analysis to size exposures; they diversify across geographies and industries; they hedge with credit default swaps and other derivatives.

The critical insight is that credit risk and market risk are linked. When the economy weakens, both stock prices fall and credit spreads widen because default risk rises. A recession is correlated with both, making a bond-heavy portfolio less of a hedge than investors often assume.

See also