What it means
Selling a call on its own generates income but exposes the seller to unlimited losses if the price rises sharply. Buying a higher-strike call caps that exposure, because any loss above the upper strike on the short call is matched by a gain on the long one.
The cost is that the higher-strike call eats into the premium collected. The result is a position with a known maximum profit and a known maximum loss from the moment it is opened.
Maximum profit is the net credit received, earned when both options expire worthless. Maximum loss is the gap between the strikes minus that credit, which is exactly what a margin department will require the trader to hold against the position.
The strategy suits a mildly bearish or neutral view rather than a conviction that the market will collapse. It makes money in three of four scenarios: the price falls, stays flat or rises modestly without reaching the lower strike.
Buying a put outright pays far more in a crash, but loses in the flat and mildly rising cases where the spread still wins. Time is on the seller's side.
Both options lose time value as expiry approaches, and because the short option is closer to the money, it decays faster than the long one. That is why traders often open these positions with 30 to 45 days to expiry and close them early once most of the credit has been captured.
The risk profile is asymmetric in an uncomfortable way: the maximum loss is usually larger than the maximum gain. A spread that risks $350 to earn $150 must win roughly seven times out of ten just to break even, so position sizing and discipline about closing losers matter more than being right about direction.
In practice
Real-world examples.
Example
An investor holds a stock that has run up 40% in three months and thinks it is stretched but does not want to sell. They open a bear call spread above the current price, collecting premium that cushions the position if the rally stalls, while capping the damage if it keeps climbing.
Example
A trader expects an index to stay range-bound through a quiet summer. They sell a call spread well above the range and treat the credit as income, accepting that a surprise breakout will cost them the defined maximum loss.
Example
A portfolio manager wants to reduce equity exposure ahead of an election without triggering capital gains tax by selling holdings. A series of bear call spreads across the portfolio's main index generates income that partly offsets any decline, with the risk capped and disclosed to the investment committee.
Formula
Calculation
Net credit = premium received on the short call - premium paid on the long call. Maximum profit = net credit. Maximum loss = (higher strike - lower strike) - net credit. Breakeven = lower strike + net credit.
A share trades at $48.00 and a trader believes it will not exceed $50.00 over the next month. Standard contracts cover 100 shares.
Sell one call with a $50 strike for $2.20 per share. Buy one call with a $55 strike for $0.70 per share.
Net credit = $2.20 - $0.70 = $1.50 per share, or $1.50 x 100 = $150 per contract.
Maximum profit = $150, achieved if the share closes at or below $50 at expiry so both calls expire worthless.
Maximum loss = ($55 - $50) - $1.50 = $5.00 - $1.50 = $3.50 per share, or $350 per contract, reached if the share closes at or above $55.
Breakeven = $50 + $1.50 = $51.50 per share.
Suppose the share closes at $53.00. The short $50 call is worth $53.00 - $50.00 = $3.00, the long $55 call expires worthless, and the trader keeps the $1.50 credit. Net result = $1.50 - $3.00 = -$1.50 per share, or a loss of $150 on the contract. Had the share closed at $47.00, both calls would expire worthless and the trader would keep the full $150.Case study
Seen in the real world.
This is an illustrative and fictional example. Marlowe Private Wealth, an invented advisory firm, ran an income overlay for clients holding concentrated positions in a listed engineering group whose shares had risen from $31 to $48 in six months. Clients wanted income and some protection but refused to sell, because most of the holdings carried very large unrealised gains.
The firm sold $55 strike calls and bought $60 strike calls expiring in seven weeks, collecting a net credit of $1.10 per share. Across a client with 4,000 shares, that produced 40 contracts and $1.10 x 100 x 40 = $4,400 of income, against a defined maximum loss of ($60 - $55 - $1.10) x 100 x 40 = $3.90 x 100 x 40 = $15,600.
In the illustrative outcome the shares drifted to $51 by expiry, both options expired worthless and the client kept the full $4,400. Marlowe's compliance file recorded the important caveat: had the shares jumped to $62 on a takeover approach, the overlay would have cost $15,600 at a moment when the client would otherwise have been celebrating.
Watch out
Common mistakes.
- Selling the call without buying the higher-strike protection, which turns a defined-risk trade into one with theoretically unlimited losses.
- Focusing on how often the strategy wins rather than on the ratio of maximum loss to maximum gain, which is what determines profitability over many trades.
- Holding to expiry out of habit, when most of the available credit is usually earned in the first two thirds of the position's life.
Questions
People also ask.
When does a bear call spread make money?
Whenever the price sits below the lower strike at expiry, and partially between the lower strike and the breakeven point.
Can the short call be exercised early?
Yes, particularly just before a dividend goes ex, so the position needs monitoring rather than being left unattended.
Why choose this over simply buying a put?
The spread profits from a flat or slightly rising market and benefits from time decay, whereas a bought put needs a real decline to pay off.
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