Bull Call Spread
Key Takeaways
- A bull call spread buys a lower-strike call and sells a higher-strike call at the same expiration
- Maximum profit is the spread width minus the net debit paid
- Maximum loss is limited to the net debit paid for the spread
- It is used when a trader expects a moderate stock price increase
Definition
A bull call spread, also called a long call spread or call debit spread, is a vertical spread strategy that involves buying a call option at a lower strike price and simultaneously selling a call option at a higher strike price on the same underlying asset with the same expiration date. The strategy has a defined risk and defined reward.
This spread is established for a net debit (the premium paid for the lower-strike call exceeds the premium received for the higher-strike call). The net debit represents the maximum possible loss. The maximum profit is limited to the width of the spread (difference between strikes) minus the net debit paid.
Bull call spreads are appropriate when a trader has a moderately bullish outlook. Unlike buying a single call, the spread reduces the cost by selling premium against the long call, but it also caps the upside. The sold call limits gains beyond its strike price, making this strategy less suitable for traders expecting very large moves.
How It Works
The mechanics of a bull call spread are straightforward. The long call provides upside exposure, while the short call generates income to offset the cost but limits the maximum gain. At expiration, if the stock is at or above the short call strike, maximum profit is achieved. If the stock is at or below the long call strike, both options expire worthless and the maximum loss (net debit) is realized.
Between the two strikes, the spread's profit increases linearly. The breakeven point is the lower strike plus the net debit paid. For example, if you buy a $50 call for $4 and sell a $55 call for $2, the net debit is $2, the breakeven is $52, and the maximum profit is $3 ($55 - $50 - $2).
Bull call spreads benefit from the stock rising, time passing (when the spread is deep in the money), and changes in implied volatility. The net delta is positive, and the net theta depends on the position of the stock relative to the strikes. When the stock is between the strikes, theta is approximately neutral.
Example
Suppose Walt Disney (DIS) is trading at $110 and you expect it to rise to $120 over the next 45 days. You buy the $110 call for $5.50 and sell the $120 call for $2.00, paying a net debit of $3.50 ($350 per spread). Maximum profit is $6.50 ($10 spread width - $3.50 debit) = $650 per spread, achieved if DIS closes at or above $120 at expiration. Maximum loss is $3.50 ($350 per spread) if DIS closes at or below $110. The breakeven is $113.50 ($110 + $3.50). This gives a reward-to-risk ratio of 1.86:1.
Why It Matters
Bull call spreads are a staple options strategy because they provide a favorable risk-reward profile for moderately bullish trades. The defined risk makes them suitable for traders who want to limit their downside while still participating in upside potential. Compared to buying a single call, the spread reduces the breakeven point and the impact of time decay.
The strategy is also more capital-efficient than buying stock or single calls. The net debit is typically much less than the cost of buying 100 shares or a single call option, allowing traders to deploy capital across multiple positions. This makes bull call spreads a practical building block for diversified options portfolios.
Advantages
- Defined risk with maximum loss limited to the net debit paid
- Lower cost than buying a single call option outright
- Reduced breakeven point compared to a naked long call
- Benefits from moderate stock increases without requiring large moves
Limitations
- Maximum profit is capped at the spread width minus the net debit
- If the stock makes a very large upward move, gains are limited by the short call
- Requires the stock to move above the breakeven point to generate profit
- Two legs mean higher commissions and potentially wider bid-ask spreads
Frequently Asked Questions
Related Terms
Browse more definitions in the financial terms glossary.