Bull Call
Spread

What is a bull call spread?

A bull call spread is a two-leg options strategy built by buying one call option at a lower strike price and simultaneously selling another call at a higher strike in the same expiry cycle. Because the premium received from the short call offsets part of the premium paid for the long call, the trade costs less than a plain long call — making it a debit spread with a tighter breakeven and lower capital at risk.

The trade-off is symmetry: just as the short call reduces cost, it also caps profit. Once the underlying rises above the short strike, any further gains on the long call are neutralised by losses on the short call. For traders with a specific price target in mind, that cap is perfectly acceptable — and the lower entry cost can mean a higher probability of hitting the target move in percentage terms.

Key takeaways

• A bull call spread is a moderately bullish, defined-risk debit strategy.
• Maximum loss is the net premium paid — always less than the cost of a standalone long call.
• Maximum profit is capped at the spread width minus the net debit — earned when the underlying closes at or above the short strike.
• Both legs share the same expiry; the position is fully defined-risk and no extra margin is blocked beyond the debit.
• The strategy suits traders who have a price target rather than open-ended bullish conviction.

How it works

Buy 1 lower-strike call (the long leg) and sell 1 higher-strike call (the short leg) on the same underlying and expiry. The net debit is the premium of the long call minus the premium received from the short call. That debit is your maximum possible loss — if the underlying closes below the lower strike, both calls expire worthless and you lose the full debit. Between the two strikes your P&L improves linearly. At or above the short strike, P&L is fixed at the maximum profit.

On NSE, the strategy is used heavily on NIFTY and Bank Nifty weekly and monthly expiries. Because both legs are long and short the same underlying on the same date, exchange margin treatment recognises the offsetting risk — no SPAN margin is blocked beyond the net premium paid. Theta has a muted effect because you are both long and short time value; the net theta is close to zero until expiry approaches and the spread starts to converge.

The numbers that matter

Worked NIFTY example

Suppose NIFTY is near 22,500 and you expect a moderate rally to around 22,800 by expiry. You buy the 22,600 call at ₹120 and sell the 22,800 call at ₹50. Net debit = ₹120 − ₹50 = ₹70. With a lot size of 75, the total cost is ₹70 × 75 = ₹5,250 (illustrative figures):

• Breakeven: 22,600 + 70 = 22,670.
• Max profit: (22,800 − 22,600 − 70) × 75 = ₹130 × 75 = ₹9,750, earned above 22,800.
• Max loss: ₹5,250 if NIFTY expires at or below 22,600.

NIFTY at expiry	Long 22,600 call	Short 22,800 call	Net P&L (1 lot)
22,400	Worthless	Worthless	−₹5,250
22,600 (low strike)	Worthless	Worthless	−₹5,250
22,670 (breakeven)	+₹70	Worthless	₹0
22,750	+₹150	−₹50 loss offset	+₹4,500
22,800 (high strike)	+₹200	−₹0 (capped)	+₹9,750
23,100	+₹500	−₹300 loss offsets	+₹9,750 (capped)

When to use it

• You are moderately bullish with a specific price target — not expecting a runaway rally but a measured move.
• You want to reduce the cost of a long call trade and lower the breakeven point.
• Implied volatility is elevated — the short leg collects a richer premium, making the spread more efficient.
• You are comfortable capping the upside in exchange for a lower breakeven and a smaller debit.

Risks to respect

• Capped profit: a large rally past the short strike yields no additional gain — you miss out on the move you correctly called.
• Full debit at risk: if the underlying moves against you or stays flat, you lose the entire net debit paid.
• Strike selection matters: setting the spread too narrow limits max profit; too wide increases the debit and brings it closer in cost to a plain long call.
• Early assignment risk on stock options: the short call leg can be assigned early on single-stock options (not a concern for cash-settled index options like NIFTY).

Bull call spread vs long call

A long call costs more but retains unlimited upside — ideal when you expect a large, sustained rally with no obvious ceiling. The bull call spread spends less and requires a smaller move to reach breakeven, making it better suited to measured, target-driven bullish trades. If NIFTY merely grinds 200 points higher, the spread can reach near-maximum profit while a long call on the same strike might still be struggling to break even on a higher premium.

Bull call spread vs bull put spread

Both strategies are moderately bullish and defined-risk, but they operate differently. The bull call spread is a debit trade — you pay to enter and need the market to rise. The bull put spread is a credit trade — you collect premium at entry and profit if the market stays above a level. Bull put spreads suit traders who want income and a neutral-to-bullish bias; bull call spreads suit those who want to express a directional up move with limited cost.

Frequently asked questions

Is a bull call spread bullish or bearish?

Moderately bullish. It profits when the underlying rises to or above the short strike by expiry, with profit capped between the two strikes.

What is the maximum profit on a bull call spread?

The maximum profit equals the spread width (high strike minus low strike) minus the net debit, multiplied by the lot size. It is achieved when the underlying closes at or above the higher strike at expiry.

What is the maximum loss on a bull call spread?

The maximum loss is the net debit paid at entry multiplied by the lot size. This occurs when the underlying closes at or below the lower strike at expiry and both calls expire worthless.

How is a bull call spread different from a long call?

A bull call spread costs less because the short higher-strike call offsets part of the premium. The trade-off is that profit is capped at the short strike. A long call retains unlimited upside but requires a bigger move to cover the higher outlay.

The bottom line

The bull call spread is the disciplined trader's bullish trade — you define both your cost and your profit target before you enter. By sacrificing unlimited upside, you gain a lower breakeven, smaller premium outlay and a higher probability of capturing the move you expected. When you can name where NIFTY is heading, not just that it is heading up, the bull call spread is often the smarter choice over a naked long call.

Related strategies & terms

• Long Call — unlimited upside bullish trade; higher cost, no profit cap.
• Bull Put Spread — credit spread alternative for a moderately bullish view.
• Bear Call Spread — the mirror trade: sell a lower call, buy a higher call for a bearish view.
• Defined Risk · Breakeven · Premium · Intrinsic Value