Bull Call Spread Singapore: A Cheaper Way to Bet on a Stock Going Up

A bull call spread is an options strategy where an investor buys a call option at a lower strike price and simultaneously sells a call option at a higher strike price on the same stock and expiry date, reducing the upfront cost of a bullish bet in exchange for a capped maximum profit.

Not financial advice. All figures for educational reference only. Data as at September 2026.

Last updated: September 2026

Key Takeaways

• A bull call spread involves buying one call option and selling another call option at a higher strike price, both with the same expiry date, on the same underlying stock.
• The premium received from selling the higher-strike call partially offsets the cost of buying the lower-strike call, making the strategy cheaper than buying a call outright.
• Both maximum profit and maximum loss are capped and known in advance, making the risk-reward profile more defined than an outright long call position.
• The strategy profits most fully once the stock price rises to or above the higher (sold) strike price at expiry, beyond which additional gains are given up.
• It is a moderately bullish strategy, best suited when an investor expects a stock to rise but not dramatically, or wants to reduce the cost of a bullish bet.

What Is Bull Call Spread?

A bull call spread, also called a call debit spread, is a two-leg options strategy designed to express a moderately bullish view on a stock while reducing the cost compared to simply buying a call option outright. The strategy involves two simultaneous transactions on the same underlying stock and expiry date: buying a call option at a lower strike price (the “long call”), and selling a call option at a higher strike price (the “short call”).

Because the call option sold at the higher strike price is cheaper than the call option purchased at the lower strike price (options closer to the current stock price, or “in the money,” generally cost more than those further away, or “out of the money”), the premium received from the short call partially offsets the cost of the long call, reducing the net upfront cost of the overall position compared to buying the lower-strike call alone.

The trade-off for this reduced cost is a capped maximum profit: once the stock price rises to or above the higher strike price at expiry, the strategy’s profit stops increasing, because any further gains on the long call are offset by corresponding losses on the short call. This makes the bull call spread a defined-risk, defined-reward strategy — both the maximum possible gain and the maximum possible loss are known and fixed at the time the position is opened.

How Does Bull Call Spread Work in Singapore?

Singapore investors typically execute bull call spreads on US-listed stocks and ETFs rather than SGX counters, again reflecting the far deeper options liquidity available in US markets through brokers like Interactive Brokers, Tiger Brokers, and moomoo, which all offer access to US options chains with a wide range of strike prices and expiry dates for actively traded stocks.

Multi-leg strategies like the bull call spread require a brokerage account with an appropriate options trading approval level, since executing both legs (buying one call, selling another) simultaneously as a defined “spread” order is more complex than a simple single-leg option purchase. Most brokers process spread orders as a single combined transaction, filling both legs together (or not at all) to avoid the risk of only one leg executing and leaving the investor with unintended, uncapped exposure.

Because a bull call spread involves selling a call option as one leg, brokers typically require the position to be executed within a margin or options-approved account, and the maximum loss (the net premium paid) is deducted or reserved from the account’s available buying power at the time the position is opened, rather than requiring the larger collateral that a naked short call position would demand.

Bull Call Spread Example

Mr Tan believes a US-listed stock currently trading at USD 100 will rise moderately over the next two months, but does not expect a dramatic surge. Instead of buying a call option outright, he opens a bull call spread: buying a call option with a USD 100 strike price for a premium of USD 6 per share, and simultaneously selling a call option with a USD 110 strike price for a premium of USD 2.50 per share, both expiring in two months. His net cost is USD 3.50 per share (USD 6.00 − USD 2.50), or USD 350 for one contract covering 100 shares.

If the stock rises to USD 110 or above by expiry, Mr Tan’s maximum profit is achieved: the USD 10 spread between strikes (USD 110 − USD 100), minus his USD 3.50 net cost, equals USD 6.50 per share, or USD 650 total — a defined maximum regardless of how much higher the stock might go beyond USD 110. If the stock instead falls to USD 95 or stays flat, both options expire worthless, and Mr Tan’s maximum loss is simply his USD 350 net premium paid, no matter how far the stock might have fallen.

Advantages of Bull Call Spread

Lower upfront cost than buying a call outright. The premium received from the short call leg reduces the net cost of the position, making a bullish bet more capital-efficient.

Defined, capped maximum loss. The most an investor can lose is the net premium paid to open the position, providing a clear and predictable worst-case scenario.

Reduces the impact of time decay compared to a long call alone. Because the strategy involves both a long and short option, the negative effect of time decay (theta) on the long call is partially offset by the short call, which benefits from time decay working in its favour.

Suited to a specific, moderately bullish price target. The strategy is well-matched to situations where an investor has a reasonably confident view on how far a stock might rise, rather than an open-ended bullish view.

Risks and Limitations

Capped maximum profit. Unlike an outright long call, which has theoretically unlimited upside, a bull call spread’s profit stops growing once the stock reaches the higher strike price, sacrificing further gains.

Requires correct timing as well as direction. The stock must rise (ideally to or above the higher strike) before the shared expiry date; being right about direction but wrong about timing can still result in a loss if the move happens after expiry.

Two-leg execution adds complexity. Managing, adjusting, or closing a spread position involves coordinating two separate option contracts rather than one, which requires more active monitoring than a single-leg trade.

Full premium can still be lost. If the stock fails to rise above the lower strike price by expiry, both options can expire worthless, resulting in the loss of the entire net premium paid.

Bull Call Spread vs Buying a Call Outright

Source: Standard options strategy mechanics — for educational comparison only, not a recommendation.

The Bottom Line

A bull call spread offers a cost-efficient, defined-risk way to express a moderately bullish view on a stock, trading away unlimited upside for a lower entry cost and a known maximum loss. It suits investors with a reasonably specific price target in mind more than those expecting an uncapped rally, and requires comfort with multi-leg options execution.

Related Terms

• Protective Put Singapore
• Iron Condor Strategy Singapore
• Covered Call Singapore
• Options Trading Singapore
• Options Assignment (Trading) Singapore

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