Strike Price: What It Means for Options Trading
Editor's Note: Options are not suitable for all investors. Options involve risks, including substantial risk of loss and the possibility an investor may lose the entire amount invested in a short period of time. Please see the Characteristics and Risks of Standardized Options.
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In options trading, a strike price represents the price at which an option purchaser can buy or sell an option’s underlying asset. An option strike price can also be referred to as an exercise price or a grant price, as it comes into play when a trader is exercising the option contract they’ve purchased.
A strike price can determine how much or how little an investor stands to gain by exercising an option contract, and can also inform the value of the option. Trading options can potentially generate higher rewards, though it can entail taking more risk than investing in individual stocks. Understanding strike prices is key to developing a successful options trading strategy.
Key Points
• Strike price is the price at which an option holder can buy or sell the underlying asset through the option.
• The strike price helps determine the value of an option and the potential gain for the trader.
• Strike prices are set when options contracts are written and can vary for different contracts.
• There are different types of options, including calls and puts, each of which will have a set strike price.
• Understanding strike price is crucial for developing a successful options trading strategy.
What Is a Strike Price?
An option is a contract that gives the owner or buyer of the option the right, though not the obligation, to buy or sell a particular security on or before a specific date, at a predetermined price. In options trading terminology, this price is called the strike price or the exercise price.
Strike prices are commonly used in derivatives trading. A derivative draws its value from an underlying investment. In the case of options contracts, this can be a stock, bond, commodity, or other type of security or index.
Further, options contracts can trade European-style or American-style. With European-style options, investors can only exercise them on their expiration date. American-style options can be exercised any time up to and upon the expiration date. This in itself doesn’t affect strike price for options contracts.
In options trading, there are two basic types of options: calls and puts. With either type of option, the strike price is set at the time the options contract is written. This strike price determines the price at which the underlying asset would be bought or sold if the option is exercised.
Calls
A call option conveys the right (though not the obligation) to a purchaser to buy shares of an underlying stock or other security at a set strike price. Call option writers are obligated to sell the shares if the option is exercised.
Puts
A put option conveys the right (though not the obligation) to a purchaser to sell shares of an underlying stock or other security at a set strike price. This is one way that investors can short a stock. Put option writers are obligated to buy the shares if the option is exercised.
Examples of Strike Price in Options Trading
Having an example to follow can make it easier to understand the concept of strike prices and how they may affect the value of an option contract. When trading options, traders must select the strike price and length of time they’ll have before exercising an option.
The following examples illustrate how strike price works when trading call or put options.
Buying a Call
Call options, again, give a purchaser the right, but not the obligation, to purchase a security at a specific price. At the same time, the seller of the call option must sell shares to the investor exercising the option at the strike price.
Let’s say you hold a call option to purchase 100 shares of XYZ stock at $50 per share (the strike price). You believe the stock’s price, currently trading at $45, will increase over time. This belief eventually pans out as the stock rises to $70 per share thanks to a promising quarterly earnings call. At this point, you could exercise your option to buy shares of the stock at the $50 strike price. The call option seller would have to sell those shares to you at that price.
The upside here is that you’re purchasing the stock at a discount, relative to its actual market price. You could then turn around and sell the shares you purchased for $50 each at the new higher price point of $70 each. This allows you to collect a $20 per share profit, less the premium you paid to purchase the call contract and any trading fees owed to your brokerage (or online brokerage).
Keep in mind, however, that if the price of the underlying stock remains below the strike price, the option will expire worthless, and you will lose the premium you paid for the option.
Buying a Put
Put options give purchasers the right, but not the obligation, to sell a security at a specific strike price. The seller of a put option has an obligation to buy shares from a trader who exercises the option.
So, assume that you hold a put option to sell 100 shares of XYZ stock at $50 per share (the strike price). You believe that the stock’s price, currently at $55, is going to decline in the next few months. The stock’s price drops to $40 per share so you decide to exercise the option. This allows you to make a profit of $10 per share (minus the premium paid per share and any fees), since you’re selling the shares at the $50 strike price, rather than their current lower market price.
But again, if the price of the stock remains above the strike price the option will expire with no value and you would lose the premium you paid upfront.
Writing a Covered Call
A covered call is an options trading strategy that can be useful when an investor believes the price of stock they own may remain neutral or rise slightly. This strategy involves doing two things:
• Writing a call option for a security
• Owning an equivalent number of shares of that same security
Writing (or selling) covered calls is a way to potentially generate income from the premiums traders pay to purchase the call option. Premiums paid by a call option buyer are nonrefundable, even if they choose not to exercise the option later.
The premium from a covered call may also offer a degree of downside protection if the stock price falls slightly (though losses would still be substantial if the price dropped significantly)..
So, say you own 100 shares of XYZ stock, currently trading at $25 per share. You write a call option for 100 shares of that same stock with a strike price of $30. You then collect the premium from the investor who buys the option.
One of two things can happen at this point: If the stock’s price rises slightly, but remains below the $30 stock price, then the option will expire worthless. You still keep the premium for writing it and you still own your shares of stock.
On the other hand, assume the stock’s price shoots up to $35. The purchaser exercises the option, meaning you must sell them those 100 shares. You still collect the premium, but your profit from selling those shares is capped at $5 per share, given the $30 strike price.
Investors should always consider the potential tradeoffs of writing covered calls, since they could cap upside potential. Covered calls are generally suitable for investors who would be comfortable selling their shares, if needed.
Moneyness
Moneyness describes an option’s strike price relative to its market price. There are three ways to measure the moneyness of an option:
In the Money
Options are in the money when they have intrinsic value. A call option is in the money when the market price of the underlying security is above the strike price. A put option is in the money when the market price of the underlying security is below the strike price.
At the Money
An option is at the money when its market price and strike price are the same (or nearly the same).
Out of the Money
An out-of-the-money option has no intrinsic value. A call option is out of the money if the market price of the underlying security is below the strike price. A put option is out of the money when the market price of the underlying security is above the strike price.
Understanding moneyness is important for deciding when to exercise options and when they may be at risk of expiring worthless.
How Is Strike Price Determined?
The strike price of an option contract is set when the contract is written. Strike prices may be determined by the exchange they’re traded on (like the Chicago Board Options Exchange, or CBOE). For listed options, strike prices are set by the exchange at standardized intervals based on the underlying asset’s market price.
A writer may issue multiple strike prices for the same underlying security so traders can choose the level they want. For example, you might see five option contracts for the same stock with strike prices of $90, $92.50, $95, $97.50 and $100. This allows investors an opportunity to select varying strike prices when purchasing calls or put options for the same stock.
Note, however, that writing calls that aren’t covered entails significant risk and can result in substantial losses. Both individual and institutional investors can write options, but there is significant risk involved — particularly when the calls they write aren’t covered.
How Do You Choose a Strike Price?
When deciding which options contracts to buy, strike price is an important consideration. Stock volatility and the passage of time can affect an option’s moneyness and your potential losses or profits should you exercise the option.
As you compare strike prices for call or put options, consider:
• Your personal risk tolerance
• Where the underlying asset is trading, relative to the option’s strike price
• How long you have to exercise the option
You may also consider using various options trading strategies to manage risk. That may include using covered calls as well as long calls, long puts, short puts, married puts, and others. Learning more about how to trade options can help you apply these strategies to pursue potential profits while potentially managing risk exposure, given the high risk of options trading.
What Happens When an Option Hits the Strike Price?
When the price of an option’s underlying asset is equal to or near the strike price it’s considered at the money. This means it has no intrinsic value as the strike price and market price are the same. There’s typically no incentive for an investor to exercise an option that’s at the money at expiration as there’s nothing to be gained from either a call or put option. In this scenario, the option may expire worthless.
If you’re the purchaser of an option that expires worthless, you would lose the money you paid for the premium to buy the contract. If you’re the writer of the option, you would profit from the premium charged to the contract buyer.
The Takeaway
Strike price is a critical concept for investors to know, especially if they’re trading or otherwise dealing with options as a part of their investing strategy. In an options contract, the strike price simply refers to the set price at which the purchaser can buy or sell the underlying security. Again, options can be high risk and fairly high-level, and may not be appropriate for all investors.
SoFi’s options trading platform offers qualified investors the flexibility to pursue income generation, manage risk, and use advanced trading strategies. Investors may buy put and call options or sell covered calls and cash-secured puts to speculate on the price movements of stocks, all through a simple, intuitive interface.
With SoFi Invest® online options trading, there are no contract fees and no commissions. Plus, SoFi offers educational support — including in-app coaching resources, real-time pricing, and other tools to help you make informed decisions, based on your tolerance for risk.
FAQ
What is a strike price in options trading?
The strike price, also known as the exercise price or grant price, is the predetermined price at which an investor can buy or sell the underlying asset of an option contract. This price is set when the options contract is written. It’s a critical factor that helps determine the value of the option and an investor’s potential gain or loss upon exercising the contract.
How does the strike price work for call and put options?
For call options, the strike price is the price at which the purchaser has the right, but not the obligation, to buy the underlying security if the market price moves in their favor. For put options, the strike price is the price at which the purchaser has the right, but not the obligation, to sell the underlying security if the market price moves favorably.
Note that writers of options contracts are obligated to buy or sell the underlying security at the strike price if a purchaser chooses to buy or sell the underlying security.
What are the three measures of an option’s “moneyness”?
Moneyness describes an option’s strike price relative to its market price. An option that is in the money (ITM) has intrinsic value. A call is ITM if its market price is above the strike price; a put is ITM if its market price is below the strike price.
An option that is out of the money (OTM) has no intrinsic value. A call is OTM if the market price is below the strike price; a put is OTM if the market price is above the strike price.
An option is at the money (ATM) if the market price and strike price are the same.
Photo credit: iStock/Paul Bradbury
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Options involve risks, including substantial risk of loss and the possibility an investor may lose the entire amount invested in a short period of time. Before an investor begins trading options they should familiarize themselves with the Characteristics and Risks of Standardized Options . Tax considerations with options transactions are unique, investors should consult with their tax advisor to understand the impact to their taxes.
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