Credit Spread Strategy: Bull Put & Bear Call Spreads
Master credit spreads to generate consistent income with defined risk. Learn bull put spreads, bear call spreads, strike selection, risk management, and when to use these popular income strategies.
What is a Credit Spread?
A credit spread is an options strategy where you sell an option and buy a further out-of-the-money option of the same type, receiving a net credit. Maximum profit is the credit received, and maximum loss is defined.
Credit spreads = Sell one option + Buy another option further OTM. You collect premium upfront (the "credit"). Your max loss is capped by the long option. Bull put spreads are bullish, bear call spreads are bearish. Profit if stock stays away from your short strike.
Credit Spread at a Glance
| Strategy Type | Directional (bullish or bearish) |
| Legs | 2 (sell option + buy further OTM option for protection) |
| Max Profit | Net credit received |
| Max Loss | Spread width minus credit received |
| Typical Win Rate | 60-70% (at 20-30 delta short strikes) |
| Ideal IV Environment | High IV — sell expensive premium |
| Best DTE | 30-45 days to expiration |
| Difficulty | Beginner to Intermediate |
| Capital Needed | $200-$1,000 per spread (depending on width) |
How Do Credit Spreads Work?
A credit spread involves selling one option and buying a further out-of-the-money option for protection. You collect a net credit (premium) upfront. If the stock stays away from your short strike through expiration, you keep the full credit as profit.
There are two types: bull put spreads (sell a put, buy a lower put — bullish) and bear call spreads (sell a call, buy a higher call — bearish). Max loss is always: spread width minus credit received. Example: $5 wide spread with $1.50 credit = $3.50 max loss.
What is a Credit Spread?
A credit spread (also called a vertical spread) involves selling one option and simultaneously buying another option at a different strike price in the same expiration. You receive a net credit because the option you sell is more expensive than the option you buy.
The bought option acts as "insurance" - it caps your maximum loss. This makes credit spreads safer than naked options and more capital-efficient than cash-secured puts or covered calls.
Bull Put Spread (Bullish)
Setup: Sell a put, buy a lower put
When to use: Moderately bullish on stock
Max profit: Premium collected
Max loss: Spread width - Premium
Profit if: Stock stays above short put strike
Bear Call Spread (Bearish)
Setup: Sell a call, buy a higher call
When to use: Moderately bearish on stock
Max profit: Premium collected
Max loss: Spread width - Premium
Profit if: Stock stays below short call strike
Why Credit Spreads Are Popular
- ✓ Defined Risk: You know your max loss before entering
- ✓ Lower Capital Requirements: Less margin than naked options
- ✓ High Probability: Win rates of 60-70% when managed properly
- ✓ Positive Theta: Earn money daily from time decay
- ✓ Flexible: Can be bullish or bearish, any underlying
Bull Put Spread: Complete Example
The Setup
Stock: SPY trading at $450
Outlook: Neutral to bullish
IV Percentile: 75th (high)
Days to Expiration: 35 days
Sell: 1 SPY $440 put @ $3.20
Buy: 1 SPY $435 put @ $2.10
Net Credit: $1.10 per share
Total Credit: $110 per spread
Risk/Reward Profile
Max Profit: $110 (credit collected)
Max Loss: $390 (spread width $5 - credit $1.10)
Breakeven: $438.90 ($440 short strike - $1.10 credit)
ROI if Win: 28.2% ($110 profit / $390 risk)
Probability of Profit: ~70% (based on Delta)
Greeks
Delta: +20 (benefits from stock rising)
Theta: +$8/day (earn from time decay)
Vega: -15 (profit if IV drops)
Gamma: -2 (risk increases near short strike)
Outcome 1: SPY at $452 at Expiration (Stock Up)
Both puts expire worthless (stock well above $440)
Result: Keep full $110 credit (28.2% return in 35 days)
Outcome 2: SPY at $441 at Expiration (Slight Move)
Still above short strike, both puts expire worthless
Result: Keep full $110 credit (28.2% return)
Outcome 3: SPY at $437 at Expiration (Through Breakeven)
$440 put worth $3, $435 put worthless. Loss = $3 - $1.10 credit = $1.90 per share
Result: -$190 loss per spread (-48.7% on capital at risk)
Outcome 4: SPY at $430 at Expiration (Stock Crashes)
Max loss scenario: $440 put worth $10, $435 put worth $5. Loss = $5 spread width - $1.10 credit
Result: -$390 max loss per spread (loss is capped!)
Bear Call Spread: Complete Example
The Setup
Stock: TSLA trading at $250
Outlook: Neutral to bearish
IV Percentile: 82nd (very high)
Days to Expiration: 30 days
Sell: 1 TSLA $260 call @ $5.50
Buy: 1 TSLA $270 call @ $2.80
Net Credit: $2.70 per share
Total Credit: $270 per spread
Risk/Reward Profile
Max Profit: $270 (credit collected)
Max Loss: $730 (spread width $10 - credit $2.70)
Breakeven: $262.70 ($260 short strike + $2.70 credit)
ROI if Win: 37.0% ($270 profit / $730 risk)
Probability of Profit: ~65%
Why This Trade?
TSLA IV is in 82nd percentile - options are expensive
Selling at resistance level ($260)
Wide $10 spread for safety buffer
30 DTE for optimal Theta decay
Best Outcome: TSLA at $245 at Expiration
Stock down or flat, both calls expire worthless
Result: Keep full $270 credit (37% return in 30 days)
How to Construct Credit Spreads: Step-by-Step
Determine Market Bias
Bullish = Bull put spread. Bearish = Bear call spread. Neutral = Can do both (iron condor).
Look at technical levels, trend, support/resistance to determine direction
Check IV Percentile
Implied volatility affects the premium collected on credit spreads.
Use our IV guide to check IV rank/percentile
Select Expiration (30-45 DTE)
30-45 days to expiration is the sweet spot for Theta decay vs time commitment.
- Too far: Theta decay too slow
- Too near: High Gamma risk, lower premiums
- 30-45 DTE: Balanced approach
Choose Short Strike (Sell)
Common approaches:
- 16 Delta: ~84% probability of profit (conservative)
- 30 Delta: ~70% probability of profit (balanced)
- 40 Delta: ~60% probability of profit (aggressive)
Choose Long Strike (Buy Protection)
Buy a strike that limits risk but doesn't eat too much premium:
- Tight spread ($2-3): Higher ROI, more risk
- Wide spread ($5-10): Lower ROI, more safety
- Target: Collect 25-35% of spread width
Enter as Spread Order
ALWAYS enter as a single spread order, not two separate legs. This ensures:
- Both legs fill at desired credit
- No legging risk (getting filled on one side only)
- Better pricing from market makers
Strike Selection Guide for Credit Spreads
| Delta | POP | Credit | Risk Level | Best For |
|---|---|---|---|---|
| 10-16 Delta | 84-90% | Low ($0.30-$0.80) | Very Low | Conservative, small accounts |
| 20-30 Delta | 70-80% | Medium ($0.80-$1.50) | Moderate | Most traders (sweet spot) |
| 35-40 Delta | 60-65% | High ($1.50-$2.50) | Elevated | Aggressive, high conviction |
| 45-50 Delta | 50-55% | Very High ($2.50+) | High | Not recommended for beginners |
Managing Credit Spreads
When to Close Early (Take Profit)
- ✓ Near-expiration (7 DTE or less): Elevated gamma risk makes the remaining time not worth holding
- ✓ 7 DTE or Less: Close if spread still has value - not worth the risk
- ✓ After Big Move: If stock moves sharply away from strikes, take the win
When Spread Is Tested
- 1. Roll Out: Buy back spread, sell same strikes further out in time
- 2. Roll Out & Up/Down: Buy back, sell further strikes with more time
- 3. Take the Loss: If stock momentum is strong, accept the loss and move on
- 4. Convert to Iron Condor: Sell opposite side to collect more premium
Risk Management for Credit Spreads
Critical Rules
If your max loss is $500, your account should be $10,000-25,000 minimum
$5-10 wide spreads give you buffer room. Tight $1-2 spreads are risky
Establish profit targets and loss limits in advance and execute them consistently
Unless you're very experienced, close spreads before earnings
Don't put 10 spreads on the same stock. Diversify across sectors
Frequently Asked Questions
What is a credit spread in options?
A credit spread is when you sell one option and buy another at a different strike, collecting a net credit upfront. The bought option limits your max loss. Examples include bull put spreads and bear call spreads.
What is the difference between bull put spread and bear call spread?
Bull put spread: Sell put + buy lower put (bullish, profit if stock stays up). Bear call spread: Sell call + buy higher call (bearish, profit if stock stays down). Both are credit spreads with defined risk.
How much can you make with credit spreads?
Typical returns are 10-30% of capital at risk per trade. For example, risk $350 to make $110 (31% ROI). Win rates are 60-70% with proper management.
What is the maximum loss on a credit spread?
Maximum loss = (Spread width - Premium collected) x 100. Example: $5 spread, $1.50 credit = ($5 - $1.50) x 100 = $350 max loss. Your loss is capped even if the stock goes to zero.
When should you close a credit spread?
Close at 50-75% of max profit for best risk/reward. Also close if: stock testing your short strike, <7 DTE with value remaining, or market conditions change dramatically.
Try this with real market data
Analyze 5,500+ stocks with real-time options chains, IV analytics, and strategy P&L calculators.
7-day free trial · No credit card required
Practice this strategy
Test this strategy with real market data in our free simulator.