Interest Rate Risk
Quick Definition
The risk that changes in interest rates will negatively impact the value of fixed-income investments.
What Is Interest Rate Risk?
Interest rate risk is the potential for investment losses resulting from changes in interest rates. It primarily affects bonds and other fixed-income securities.
How Interest Rate Risk Works:
When interest rates rise:
- Existing bond prices fall
- New bonds offer higher yields
- Fixed-rate investments become less attractive
When interest rates fall:
- Existing bond prices rise
- New bonds offer lower yields
- Fixed-rate investments become more valuable
Bond Price/Yield Relationship:
| Rate Change | Bond Price | New Bond Yield |
|---|---|---|
| Rates ↑ 1% | Price ↓ | Higher |
| Rates ↓ 1% | Price ↑ | Lower |
Measuring Interest Rate Risk:
Duration:
- Measures bond price sensitivity to rate changes
- Higher duration = more interest rate risk
- A bond with 7-year duration loses ~7% if rates rise 1%
Duration Formula (Simplified): Price Change ≈ -Duration × Yield Change
Factors Affecting Interest Rate Risk:
| Factor | Higher Risk | Lower Risk |
|---|---|---|
| Maturity | Longer (30-year) | Shorter (2-year) |
| Coupon | Lower/Zero coupon | Higher coupon |
| Credit Quality | Investment grade | High yield |
Managing Interest Rate Risk:
- Ladder bonds: Stagger maturities
- Short duration: Less sensitivity
- Floating rate: Adjusts with rates
- TIPS: Inflation-protected
- Diversify: Mix maturities
Current Relevance: With Fed policy shifts, understanding this risk is crucial for portfolio construction.
Interest Rate Risk Example
- 1In 2022, as Fed raised rates from 0% to 4.5%, long-term bonds lost over 30%
- 2A 10-year Treasury with 8-year duration loses 8% if rates rise 1%
Related Terms
Bond
A fixed-income debt security where investors loan money to an issuer in exchange for regular interest payments and return of principal at maturity.
Yield
The income return on an investment, expressed as a percentage of the investment's price or cost, typically from dividends or interest payments.
Federal Reserve (The Fed)
The central banking system of the United States, responsible for monetary policy, bank regulation, and financial stability.
Standard Deviation
A statistical measure of how spread out returns are from the average, quantifying investment volatility and risk.
Risk Management
The systematic process of identifying, assessing, and mitigating financial risks to protect portfolio value and achieve investment objectives.
Hedging
An investment strategy that uses offsetting positions to reduce the risk of adverse price movements in an existing asset or portfolio.
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