Bull Call Spread
How to structure a bull call spread for defined-risk bullish trades
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Bull Call Spread
The bull call spread is the first spread most traders learn, and for good reason. It is straightforward, defined risk, and gives you a clear way to express a bullish opinion without overpaying.
How It Works
You buy a call at a lower strike and sell a call at a higher strike, both with the same expiration. That is it. Two legs, one trade.
The long call gives you upside exposure. The short call caps your profit but also reduces your cost. The difference between the two strike prices is the width of the spread. The net amount you pay is the debit, and that is your maximum loss.
Real Example
MSFT is trading at $380. You think it is heading to $400 over the next 45 days.
- Buy the $380 call for $12.00
- Sell the $390 call for $7.00
- Net debit: $5.00 ($500 per spread)
Maximum loss: $5.00 ($500) — the debit you paid Maximum profit: $5.00 ($500) — width of strikes ($10) minus the debit ($5) Breakeven: $385 — long strike plus the debit
If MSFT is at $390 or above at expiration, you make the full $500. If it is below $380, you lose the full $500. Between $380 and $385, you lose some but not all. Between $385 and $390, you profit but less than the max.
Why Use It Instead of a Naked Call
That naked $380 call costs $12.00 or $1,200. The spread costs $500. You cut your risk by more than half. Yes, your profit is capped at $500 instead of being unlimited, but let us be honest — MSFT going from $380 to $400 in 45 days is a solid move. You do not need unlimited upside for that.
Also consider the breakeven. The naked call needs MSFT at $392 to break even. The spread only needs $385. That is a $7 difference. The spread is profitable with a smaller move.
Choosing Strike Prices
The width between strikes determines your risk-reward ratio.
Narrow spread ($380/$385, $2.50 debit):
- Max risk: $250
- Max profit: $250
- Risk/reward: 1:1
Wide spread ($380/$400, $8.00 debit):
- Max risk: $800
- Max profit: $1,200
- Risk/reward: 1:1.5
Wider spreads give better risk-to-reward ratios but need a bigger move to hit max profit. Narrower spreads are cheaper but the risk-reward is closer to even.
A common approach is to pick strikes that are 5 to 10 points wide on higher-priced stocks and 2 to 5 points wide on lower-priced stocks. The long strike is usually at-the-money or slightly in-the-money, and the short strike is where you think the stock can reasonably get to.
When to Enter
Bull call spreads work best when:
- You have a moderate bullish outlook (not expecting a moonshot)
- Implied volatility is not extremely high (high IV inflates the debit)
- You want defined risk from the start
- Expiration is 30 to 60 days out, giving the stock time to move
Avoid entering when IV is at annual highs. The premium you pay will be inflated, and if IV drops after you enter, both legs lose value but your long call loses more since it has more vega exposure.
Managing the Trade
Take profits early. If you paid $5.00 for a $10 wide spread and it hits $7.50, that is a 50% return. Waiting for the last $2.50 means holding through expiration risk. Many traders close at 50% to 75% of max profit.
Cut losses. If the spread drops to $2.50 (a 50% loss on your debit), seriously consider closing. The stock is moving against you and you should not ride it to zero.
Watch the short strike. If the stock blows past your short strike before expiration, the spread is near max value. Close it and take the win.
Common Mistakes
Buying too far out-of-the-money. A $380/$390 spread when MSFT is at $350 is cheap for a reason. The stock needs to rally $30 just to reach your long strike. Cheap spreads with low probability are not bargains.
Too short expiration. A one-week bull call spread needs the stock to move fast. Give yourself time. Thirty to sixty days is the sweet spot.
Ignoring liquidity. Wide bid-ask spreads on the individual options mean you overpay on entry and get less on exit. Stick to liquid names.
The bull call spread is your bread-and-butter bullish defined-risk trade. Master this one and you have a tool you will use for the rest of your trading career.