What is a Bull Call Spread?
Buy to Open Lower-Strike Call
Creates bullish upside exposure.
Sell to Open Higher-Strike Call
Generates premium and lowers the net cost.
Mental model: buy upside, then sell some farther-up upside to make the trade cheaper.
When to use it
| Situation | Fit? | Why |
|---|---|---|
| Expect a moderate rise | Good fit | Profits from upside without requiring an extreme rally. |
| Want lower cost than a Long Call | Good fit | The short call offsets part of the long-call premium. |
| Want defined maximum loss | Good fit | Maximum loss is the net debit paid. |
| Expect a huge rally | May be too limiting | Profit is capped at the short-call strike. |
| Expect flat or falling stock | Poor fit | The spread can lose its full debit. |
Worked example
Assume a stock trades at $100 and you expect it to rise toward $110.
| Leg | Action | Strike | Premium |
|---|---|---|---|
| 1 | Buy to Open Call | $100 | Pay $6.00 = -$600 |
| 2 | Sell to Open Call | $110 | Receive $2.00 = +$200 |
Net Debit = $6.00 - $2.00 = $4.00/share = $400
Maximum profit, loss, and break-even
Maximum Loss = Net Debit = $400
Spread Width = $110 - $100 = $10
Maximum Profit = ($10 - $4) × 100 = $600
Break-even = $100 + $4 = $104
What happens at expiration?
| Stock Price | Approximate Outcome | Meaning |
|---|---|---|
| $95 | -$400 max loss | Both calls expire worthless. |
| $100 | -$400 max loss | The long call has no intrinsic value. |
| $104 | Break-even | The long call is worth $4/share. |
| $106 | About +$200 | The long call is worth $6/share. |
| $110 | +$600 max profit | The spread reaches its full $10 value. |
| $120 | Still +$600 | Further upside is offset by the short call. |
Bull Call Spread vs. Long Call
| Feature | Bull Call Spread | Long Call |
|---|---|---|
| Cost | Lower | Higher |
| Maximum loss | Net debit | Premium paid |
| Maximum profit | Capped | Potentially very large |
| Best market view | Moderately bullish | Strongly bullish |
How to choose strikes
| Choice | Typical Effect |
|---|---|
| Lower long-call strike | More expensive, higher delta, more stock-like. |
| Higher long-call strike | Cheaper, but needs more upside. |
| Short call closer to long call | Lower cost but lower maximum profit. |
| Short call farther away | Higher cost but more upside room. |
Pros and cons
Pros
- Lower cost than a comparable Long Call.
- Defined maximum loss.
- Clear break-even and profit target.
- Good for a moderate bullish view.
Cons
- Maximum profit is capped.
- The full debit can be lost.
- Requires enough upside before expiration.
- Two legs add complexity.
How to close it
Open: pay a net debit.
Close: sell the spread for a net credit.
Close: sell the spread for a net credit.
Profit = Closing Credit - Opening Debit
Example: open for $4.00 and later close for $7.00.
Profit = ($7.00 - $4.00) × 100 = $300
Beginner checklist
| Check | Question |
|---|---|
| ☐ Direction | Do I expect a moderate rise? |
| ☐ Long strike | Where should bullish exposure begin? |
| ☐ Short strike | At what price am I willing to cap profit? |
| ☐ Net debit | What is my maximum loss? |
| ☐ Max profit | Is the reward worth the risk? |
| ☐ Break-even | Can the stock realistically exceed it? |
| ☐ Expiration | Does the thesis have enough time? |
| ☐ Liquidity | Are both legs liquid? |
Key takeaway
Bull Call Spread = Buy Lower-Strike Call + Sell Higher-Strike Call
Use it when you are moderately bullish and want lower cost and defined risk in exchange for capped upside.