Debit spread is an options strategy where you buy one option and sell another at a different strike price, paying a net debit. The short option reduces your cost but caps your profit potential. Debit spreads profit from directional movement and are popular for defined-risk directional trades with lower capital requirements than outright calls or puts.
- Buy one option, sell another to reduce cost
- Pay net debit upfront
- Max loss = debit; Max profit = spread width - debit
How Debit Spreads Work
Two main types of debit spreads:
Bull Call Spread (Bullish):
- Buy lower strike call
- Sell higher strike call
- Profit if stock rises to or above short call
Bear Put Spread (Bearish):
- Buy higher strike put
- Sell lower strike put
- Profit if stock falls to or below short put
Example - Bull Call Spread:
Stock: $100
Buy $100 Call: -$4.00
Sell $105 Call: +$2.00
Net Debit: $2.00
Max Loss: $2.00 (if stock below $100)
Max Profit: $5 - $2 = $3.00 (if stock above $105)
Breakeven: $100 + $2 = $102
Quick Reference: Debit Spreads
| Type | Buy | Sell | Outlook |
|---|---|---|---|
| Bull Call Spread | Lower call | Higher call | Bullish |
| Bear Put Spread | Higher put | Lower put | Bearish |
Example: Bull Call Spread
Buying Call Debit Spread:
| Leg | Strike | Premium |
|---|---|---|
| Buy Call | $100 | -$5.00 |
| Sell Call | $105 | +$2.50 |
| Net Debit | $2.50 |
| Outcome | P/L |
|---|---|
| Stock below $100 | -$2.50 (max loss) |
| Stock at $102.50 | $0 (breakeven) |
| Stock above $105 | +$2.50 (max profit) |
Debit spreads buy one option and sell another to reduce cost. Bull call spreads are bullish; bear put spreads are bearish. Max loss is the debit paid. Max profit is spread width minus debit. Cheaper than naked options but profits are capped.
Debit Spread Greeks
| Greek | Debit Spread |
|---|---|
| Delta | Positive (in your direction) |
| Gamma | Positive near ATM |
| Theta | Negative (time decay hurts) |
| Vega | Reduced (partially offset) |
When to Trade Debit Spreads
Ideal Conditions
- Clear directional view
- IV is elevated (reduces cost)
- Want defined risk
- 30-60 days to expiration
Debit vs Single Option
- Lower cost
- Lower vega risk
- Capped profit
- Better in high IV
Choosing Spread Width
| Width | Cost | Max Profit | Win Rate |
|---|---|---|---|
| Narrow ($2.50) | Low | Low | Lower |
| Medium ($5) | Medium | Medium | Medium |
| Wide ($10) | Higher | Higher | Higher |
Wider spreads cost more but behave more like long options.
Managing Debit Spreads
Take Profits
Consider taking 50-75% of max profit. Don’t always wait for full move.
Time Management
Exit if not working by 50% time elapsed. Theta works against you.
Adjustment
Can roll to later expiration if thesis still valid.
Common Mistakes
-
Spread too narrow – Need bigger move for same profit vs wider spread.
-
Holding too long – Time decay accelerates. Take profits.
-
Wrong expiration – Too short = not enough time. Too long = expensive.
-
Ignoring breakeven – Stock must move past breakeven to profit.
How JournalPlus Tracks Debit Spreads
JournalPlus logs both legs of debit spreads, tracks cost basis, and analyzes which spread widths and expirations work best for your directional trades.
