Guide to Short Put Spreads

A short put spread, sometimes called a bull put spread or short put vertical spread, is an options trading strategy that investors may use when they expect a slight rise in the price of an underlying asset. This strategy, which involves a short put and a long put with the same expiration, but different strike prices, allows an investor to profit from an increase in the underlying asset’s price while also limiting losses from downward price movement. An investor using this spread can also determine their maximum potential profit and loss upfront.

When trading options, you have various strategies, like short put spreads, from which you can choose. The short put spread strategy can be a valuable trade for investors with a neutral-to-bullish outlook on an asset. Which options trading strategy is right for you will depend on several factors, like your risk tolerance, cash reserves, and perspective on the underlying asset.

What Is a Short Put Spread?

A short put spread is an options trading strategy that involves buying one put option contract and selling another put option on the same underlying asset with the same expiration date but at different strike prices. This strategy is a neutral-to-bullish trading play, meaning that the investor believes the underlying asset’s price will stay flat or increase during the life of the trade.

A short put spread is a credit spread in which the investor receives a credit when they open a position. The trader buys a put option with a lower strike price and sells a put option with a higher strike price. The difference between the price of the two put options is the net credit the trader receives, which is the maximum potential profit in the trade, after any commissions and fees.

The maximum loss in a short put spread is the difference between the strike prices of the two puts minus the net credit received. This gives the trading strategy a defined downside risk.

Although the strategy has limited upside risk, external factors, such as fees and the possibility of early assignment, can still impact profitability.

A short put spread is also known as a short put vertical spread because of how the strike prices are positioned — one lower and the other higher — even though they have the same expiration date.

How Short Put Spreads Work

With a short put spread, the investor uses put options, which give the investor the right — but not always the obligation — to sell a security at a given price during a set period of time.

An investor using a short put spread strategy will sell a put option at a given strike price and expiration date, receiving a premium for the sale. This option is known as the short leg of the trade.

Simultaneously, the trader will also buy a put option at a lower strike price, paying a premium. This option is called the long leg. The premium for the long leg put option will always be less than the short leg since the lower strike put is further out of the money. Because of the difference in premiums, the trader receives a net credit for setting up the trade.

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Short Put Spread Example

Say stock ABC is trading around $72. You feel neutral to bullish toward the stock, so you open a short put spread by selling a put option with a $72 strike price and buying a put with a $70 strike. Both put options have the same expiration date. You sell the put with a $72 strike price for a $1.75 premium and buy the put with a $70 strike for a $0.86 premium.

You collect the difference between the two premiums, which is $0.89 ($1.75 – $0.86), less any fees. Since each option contract is usually for 100 shares of stock, you’d collect an $89 credit before considering costs or margin requirements.

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Maximum Profit

The credit collected up front is the maximum profit in a short put spread. In a short put spread, you can achieve your maximum profit when the stock price remains at or above the strike price of the option you sold. Both put options expire worthless in this scenario.

In our example, as long as stock ABC closes at or above $72 at expiration, both puts will expire worthless and you will keep the $89 credit you received when you opened the position.

Maximum Loss

The maximum loss in a short put spread is the difference between the strike prices of the two put options minus the credit you receive initially, plus any commissions and fees incurred. You will realize the maximum loss in a short put spread if the underlying asset’s price expires below the strike price of the put option you bought.

In our example, you will see the maximum loss if stock ABC trades below $70, the strike price of the put option you bought, at expiration. The maximum loss will be $111 in this scenario, not including commissions and fees.

Maximum loss: ($72 – $70) – ($1.75 – $0.86) = $1.11 x 100 shares = $111

Breakeven

The breakeven on a short put spread trade is the price the underlying asset must close at for the investor to come away even. They neither make nor lose money on the trade, not including commissions and investment fees.

To calculate the breakeven on a short put spread trade, you subtract the net credit you receive upfront from the strike price of the short put contract you sold, which is the option with the higher strike price.

In our example, you subtract the $0.89 credit from $72 to get a breakeven of $71.11. If stock ABC closes at $71.11 at expiration, you will lose $89 from the short leg of the trade with a $72 strike price, which will be balanced out by the $89 cash credit you received when you opened the position.

Set-Up

To set up a short put spread, you first need to find a security that you are neutral to bullish on. Once you have found a reasonable candidate, you’ll want to set it up by entering your put transactions.

You first sell to open a put option contract with a strike price near where the asset is currently trading. You then buy to open a put option with a strike price that’s out-of-the-money; the strike price of this contract will be below the strike price of the put you are selling. Both of these contracts will have the same expiration date.

Maintenance

The short put spread does not require much ongoing maintenance since your risk is defined to both upside and downside.

However, you may want to pay attention to the possibility of early assignment, especially with the short leg position of your trade — the put with the higher strike price. You might want to close your position before expiration so you don’t have to pay any potential assignment fees or trigger a margin call. Early assignment occurs when the holder of a short position is required to fulfill their obligation before expiration, typically when the option is in the money. Investors may choose to close their position before expiration to avoid the risk of early assignment, especially if the underlying asset is approaching (or has surpassed) the short option’s strike price.

Exit Strategy

If the stock’s price is above the higher strike price at expiration, there is nothing you have to do; both puts will expire worthless, and you will walk away with the maximum profit of the credit you received.

If the stock’s price is below the lower strike price of the long leg of the trade at expiration, both options will be in the money. The short put will be assigned, requiring the investor to buy shares at the higher strike price, while the long put offsets some of the loss by allowing the sale of shares at the lower strike price.This results in the maximum loss, which is the difference in strike prices minus the net credit received.

Before expiration, however, you can exit the trade to avoid having to buy shares that you may be obligated to purchase since you sold a put option. To exit the trade, you can buy the short put contract to close and sell the long put contract to close.

Impacts of Time, Volatility, and Price Change

Changes in the price and volatility of the underlying stock and the passage of time can affect a short put spread strategy in various ways.

Time

Time decay benefits this strategy because the value of the sold put declines faster than the bought put. As expiration gets closer, the difference in time value erosion allows the trader to keep more of the initial credit received.

Volatility

Because the strategy consists of both a long and a short put, changes in volatility tend to have a limited effect on the overall spread. While each leg may respond differently to volatility shifts, the combined position mitigates much of this impact.

Price

A short put spread is a bullish option strategy. You have no risk to the upside and will achieve your maximum profit if the underlying stock closes above the strike price of the higher put option. You are sensitive to price decreases of the underlying stock and will suffer the maximum loss if the stock closes below the strike price of the lower put option.

Pros and Cons of Short Put Spreads

Here are some of the advantages and disadvantages of using short put spreads:

Short Put Calendar Spreads

A short put calendar spread is another type of spread that uses two different put options. With a short put calendar spread, the two options have the same strike price but different expiration dates. You sell a put with a further out expiration and buy a put with a closer expiration date.

Traders may use a short put calendar spread when they expect minimal price movement in the underlying asset, but anticipate a decline in implied volatility. This strategy differs from a short put spread, which benefits more from directional price movement rather than volatility shifts. The short put calendar spread seeks to profit from the faster decay of the near-term option relative to the longer-term option.

Alternatives to Short Put Spreads

Short put vertical spreads are just one of the several options spread strategies investors can use to bolster a portfolio.

Bull Put Spreads

A bull put spread is another name for the short put spread. The short put spread is considered a bullish investment since you’ll get your maximum profit if the stock’s price increases.

Bear Put Spread

As the name suggests, a bear put spread is the opposite of a bull put spread; investors will implement the trade when they have a bearish outlook on a particular underlying asset. With a bear put spread, you buy a put option near the money and then sell a put option on the same underlying asset at a lower strike price.

Call Spreads

Investors can also use call spreads to achieve the same profit profile as either a bull put spread or a bear put spread. With a bull call spread, you buy a call at one strike price (usually near or at the money) and simultaneously sell a call option on the same underlying with the same expiration date further out of the money.

Conversely, with a bear call spread, an investor sells a call option at a lower strike price and buys a call option at a higher strike price, both with the same expiration date. This strategy is used when the trader expects the underlying asset’s price to decline or remain below the sold call’s strike price, aiming to profit from the initial net credit they received.

The Takeaway

A short put spread is an options strategy that allows you to collect a credit by selling an at-the-money put option and buying an out-of-the-money put with the same expiration on the same underlying security. A short put spread is a bullish strategy where you achieve your maximum profit if the stock closes at or above the strike price of the put option you sold.

While this trading strategy has a limited downside risk, it provides defined risks and rewards, which may differ significantly from owning the underlying security outright.

Investors who are ready to try their hand at options trading despite the risks involved, might consider checking out SoFi’s options trading platform offered through SoFi Securities, LLC. The platform’s user-friendly design allows investors to buy put and call options through the mobile app or web platform, and get important metrics like breakeven percentage, maximum profit/loss, and more with the click of a button.

Plus, SoFi offers educational resources — including a step-by-step in-app guide — to help you learn more about options trading. Trading options involves high-risk strategies, and should be undertaken by experienced investors. Currently, investors can not sell options on SoFi Active Invest®.

FAQ

Is a short put spread bullish or bearish?

A short put spread is a neutral to bullish options strategy, meaning you believe the price of an underlying asset will increase during the life of the trade. You will make your maximum profit if the stock closes at or above the strike price of the higher-priced option at expiration.

How would you close a short put spread?

To close a short put spread, you enter a trade order opposite to the one you entered to open your position. This would mean buying to close the put you initially sold and selling to close the put you bought to open.

What does shorting a put mean?

Shorting a put means selling a put contract. When you sell a put option contract, you collect a premium from the put option buyer. You’ll get your maximum profit if the underlying stock closes at or above the put’s strike price, meaning it will expire worthless, allowing you to keep the initial premium you received when you opened the position.

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