A credit spread is a trade that receives an upfront credit by selling one option and buying another, or the yield difference between a risky bond and a lower-risk benchmark such as a U.S. Treasury.
The term has two common meanings. In options trading, it describes the difference between premiums received and paid. In bond markets, it describes the difference between two yields.
Credit Spreads in Options Trading
An options credit spread uses two options on the same underlying asset with the same expiration date:
- The trader sells the more expensive option.
- The trader buys a cheaper option at a different strike price.
- The difference between the premium received and the premium paid creates a net credit.
The purchased option caps the potential loss on the sold option. This gives the trade a defined maximum loss, although that loss can still be much larger than the initial credit.
Credit Spread Example
Assume a stock is trading at $100:
- Sell the $95 put for $2.00
- Buy the $90 put for $0.80
- Net credit: $1.20
A standard U.S. equity option contract generally represents 100 shares. The trade therefore produces an upfront credit of $120 before transaction costs.
| Outcome | Calculation | Result |
|---|---|---|
| Maximum profit | Net credit × 100 | $120 |
| Spread width | $95 - $90 | $5 |
| Maximum loss | ($5 - $1.20) × 100 | $380 |
| Breakeven price | $95 - $1.20 | $93.80 |
The maximum profit is limited to the credit received. The maximum loss is generally the difference between the strikes minus the credit, multiplied by the contract multiplier.
The Two Main Types of Options Credit Spreads
Bull Put Spread
A bull put spread involves:
- Selling a higher-strike put
- Buying a lower-strike put
- Receiving a net credit
Traders generally use a bull put spread when they expect the underlying asset to remain above the short put strike or rise moderately.
Example: Sell the $95 put and buy the $90 put.
The trade is profitable if the stock remains above the short $95 put at expiration. The maximum profit is the premium received. The long $90 put limits the loss if the stock falls below the short strike.
Bear Call Spread
A bear call spread involves:
- Selling a lower-strike call
- Buying a higher-strike call
- Receiving a net credit
Traders generally use a bear call spread when they expect the underlying asset to remain below the short call strike or decline moderately.
Example: Sell the $105 call and buy the $110 call.
The trade is profitable if the stock remains below the short $105 call at expiration. The long $110 call limits the loss if the stock rises sharply.
How Credit Spreads Make or Lose Money
An options credit spread makes money when the options sold lose value faster than the options bought, or when both options expire worthless.
The main factors are:
- Price movement: The underlying asset must remain on the profitable side of the short strike.
- Time decay: Time decay often helps the option seller when the underlying asset does not move too far against the position.
- Implied volatility: A decline in implied volatility can reduce the value of both options and may help a net short-premium position.
- Strike selection: A strike farther from the current price usually provides less premium but gives the trade more room to remain profitable.
- Expiration: A longer expiration can provide more premium, but it also gives the underlying asset more time to move against the trade.
The risk comes from the combined position, not only from the short option. The net Delta, Gamma, Theta and Vega of both legs determine how the spread responds to price, time and volatility changes.
Credit Spread Versus Debit Spread
| Feature | Credit spread | Debit spread |
|---|---|---|
| Opening cash flow | Trader receives a net credit | Trader pays a net debit |
| Maximum profit | Usually limited to the credit | Usually limited to spread width minus the debit |
| Maximum loss | Usually spread width minus the credit | Usually the debit paid |
| Typical outlook | Neutral, moderately bullish or moderately bearish | Directional bullish or bearish |
| Time decay | Often helpful, but not always | Often harmful, but not always |
A credit spread is not automatically safer than a debit spread. Its maximum loss can be much larger than its maximum profit, while a debit spread usually risks only the amount paid to open the trade.
Important Risks of Options Credit Spreads
A credit spread has a defined maximum loss because the long option limits the short option's risk. The position can still create practical risks before it is closed or reaches expiration.
Key risks include:
- Maximum loss: The spread can lose far more than the initial credit received.
- Assignment: The short option can be assigned before expiration, particularly when it is an American-style option.
- Gap risk: The underlying asset can move sharply overnight, leaving little opportunity to exit at a favorable price.
- Liquidity risk: Wide bid-ask spreads can raise the cost of opening or closing the position.
- Expiration risk: A short option near its strike at expiration can create uncertainty about assignment and settlement.
- Leverage: Options can magnify gains and losses. Brokers also require specific approval before customers can trade them.
Credit Spreads in Bonds
In fixed-income investing, a credit spread is the difference between the yield on a corporate bond and the yield on a Treasury security with a comparable maturity.
For example:
- 10-year U.S. Treasury yield: 4.00%
- 10-year corporate bond yield: 5.25%
- Credit spread: 1.25 percentage points, or 125 basis points
The corporate bond offers the extra yield because investors accept risks that do not apply to a comparable Treasury bond. Those risks include possible default, lower liquidity and greater uncertainty. The Federal Reserve describes corporate bond spreads as compensation for holding debt exposed to default and liquidity risks.
What Widening and Narrowing Mean
- Widening credit spreads: Investors demand more compensation for credit risk. This often happens when default concerns, recession fears or market stress increase.
- Narrowing credit spreads: Investors demand less extra compensation. This often reflects stronger economic expectations or a greater willingness to hold credit risk.
Credit spreads can provide information about expected corporate defaults and future economic activity. They are not a pure measure of default probability because they also include liquidity and risk-premium components.
The Simplest Way to Remember Credit Spreads
The meaning depends on the market:
- In options, a credit spread means selling one option, buying another and receiving a net premium.
- In bonds, a credit spread means the corporate bond yield minus the yield on a comparable Treasury.
For a beginner asking about trading strategies, "credit spread" usually refers to an options strategy, especially a bull put spread or bear call spread. In a fixed-income discussion, it usually refers to the extra yield investors demand for taking credit and liquidity risk.