Bull Call Spread

A bull call 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, both with the same expiration date. This creates a debit spread — you pay a net premium upfront — that profits when the underlying stock rises moderately. It's often called a "long call spread" or "call debit spread."

When to Use a Bull Call Spread

Bull call spreads work best when:

• You're moderately bullish (expect a move up, but not an explosive one)
• Implied volatility is elevated (selling the higher strike offsets expensive premiums)
• You want defined risk and lower capital requirements than buying calls outright
• You're targeting a specific price range by expiration

The Setup

• Max Profit: Width of strikes minus net debit paid (achieved if stock closes at or above the short strike)
• Max Loss: Net debit paid (if stock closes at or below the long strike)
• Breakeven: Long strike + net debit paid
• Delta profile: Net positive delta, but less than a single long call

Example

Stock trading at $100. You buy the $100 call for $5 and sell the $105 call for $2:

• Net debit: $3 ($300 per contract)
• Max profit: $5 - $3 = $2 ($200 per contract)
• Max loss: $3 ($300 per contract)
• Breakeven: $103

Bull Call Spread vs. Long Calls

Compared to simply buying long calls, the bull call spread:

• Costs less: Selling the higher strike reduces your premium outlay
• Caps your upside: You give up profits above the short strike
• Reduces vega exposure: Less sensitive to IV changes
• Lower breakeven: Easier for the trade to become profitable

The trade-off is clear: you sacrifice unlimited upside for reduced cost and risk. If you expect a massive move, long calls may be better. If you expect a measured move to a target price, the spread is more capital efficient.

Common Mistakes

1. Too narrow strikes: Reduces max profit potential and increases the impact of commissions
2. Too wide strikes: Requires a larger move to reach max profit
3. Ignoring liquidity: Four transactions total (open and close both legs) mean bid-ask spread costs add up
4. Holding too long: Time decay accelerates near expiration; consider closing at 50-75% of max profit

Bull call spreads are a staple strategy for traders who want bullish exposure with defined risk and better capital efficiency than outright call buying.