Bull Call Spread Options Strategy Guide

When it makes sense

• You expect a moderate rise to a specific level, not an unlimited rally
• Implied volatility is high enough that an outright long call is expensive
• You want a better breakeven than an outright long call
• You want a fixed, known maximum loss and a fixed, known target

How it works

Buy one call at or near the money and sell one call at a higher strike, same expiration. The net premium paid is the debit and the maximum loss. At expiration: below the long strike both calls expire worthless and you lose the debit; above the short strike both are in the money and the spread is worth its full width, for a profit of width minus debit; between the strikes the spread is worth the stock price minus the long strike. Breakeven is the long strike plus the debit. Wider spreads cost more and pay more; a spread whose short strike is already at the stock price is a high-probability, low-payout bet, while one with both strikes out of the money is a cheap long shot.

Risk and reward

Maximum loss: the debit paid. Maximum profit: (width minus debit) times 100, earned only if the stock finishes at or above the short strike. Breakeven: long strike plus debit. Return on risk is max profit divided by the debit; a spread bought for 40% of its width returns 150% at the cap. The trade-off versus an outright call is explicit: you gain a lower cost and breakeven, you give up everything above the short strike.

Greeks and volatility

Net delta is positive but smaller than the long call's alone, since the short call offsets part of it. Theta is negative while the stock is below the midpoint of the spread and turns positive once the stock is above it, because the short call then decays faster than the long. Vega is small and behaves the same way: a volatility rise helps when the stock is below the strikes and hurts once the spread is deep in the money. This muted sensitivity to time and volatility is the main reason to prefer a spread over a single call.

Managing the trade

Close before expiration once most of the maximum profit is captured; the last 10 to 20% of the spread's value takes the longest to collect and carries the most gamma risk. The short call can be assigned early, most often when it is in the money ahead of an ex-dividend date; if so you are short 100 shares against a long call, which caps the risk, and you can exercise the long call to deliver. Pin risk at expiration applies if the stock closes between the strikes: decide before the close whether you want the shares.

What to screen for

Screen on the debit as a percent of the width (cheaper is a lower probability but higher payout), probability of finishing above breakeven, and return on risk. Pair with a momentum or oversold filter depending on whether you are buying strength or a bounce. The scanner's ATR-move-target return shows what the spread pays if the stock makes a typical move rather than the maximum one.

Frequently asked questions

What is the breakeven of a bull call spread?

The long strike plus the net debit. Buying the $150 call and selling the $160 call for a $3.80 debit breaks even at $153.80 at expiration.

What is the maximum profit on a call debit spread?

The strike width minus the debit, times 100. A $10-wide spread bought for $3.80 can make at most $620 per spread, reached when the stock finishes at or above the short strike.

Bull call spread or long call?

The spread costs less, has a lower breakeven, and cares less about time decay and volatility, but its profit is capped at the short strike. Buy the outright call when you expect a large move; buy the spread when you expect a move to a level.

Bull call spread or bull put spread?

Both are bullish and defined-risk. The call debit spread pays a debit and profits if the stock rises through breakeven; the put credit spread collects a credit and profits if the stock simply stays above the short put, so it has a higher probability and a lower payout.

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