The Ins and Outs of Selling Options

On the earth of shopping for and selling stock options, decisions are made with reference to which strategy is best when considering a trade. Investors who’re bullish should buy a call or sell a put, whereas in the event that they’re bearish, they should buy a put or sell a call.

There are numerous reasons to decide on each of the varied strategies, nevertheless it is commonly said that “options are made to be sold.” This text will explain why options are likely to favor the choices seller, the way to get a way of the probability of success in selling an option, and the risks related to selling options.

Key Takeaways

  • Selling options will help generate income during which they receives a commission the choice premium upfront and hope the choice expires worthless.
  • Option sellers profit as time passes and the choice declines in value; in this manner, the vendor can book an offsetting trade at a lower premium.
  • Nonetheless, selling options may be dangerous when the market moves adversely, and there’s not an exit strategy or hedge in place.

Intrinsic Value, Time Value, and Time Decay

For review, a call option gives the client of the choice the proper, but not the duty, to purchase the underlying stock at the choice contract’s strike price. The strike price is merely the worth at which the choice contract converts to shares of the safety. A put option gives the client of the choice the proper, but not the duty, to sell the stock at the choice’s strike price. Every option has an expiration date or expiry.

There are multiple aspects that go into or comprise an option contract’s value and whether that contract can be profitable by the point it expires. The present price of the underlying stock because it compares to the choices strike price in addition to the time remaining until expiration play critical roles in determining an option’s value.

Intrinsic Value

An option’s value is made up of intrinsic and time value. Intrinsic value is the difference between the strike price and the stock’s price out there. The intrinsic value relies on the stock’s movement and acts almost like home equity.

If an option is amazingly profitable, it’s deeper in-the-money (ITM), meaning it has more intrinsic value. As the choice moves out-of-the-money (OTM), it has less intrinsic value. Options contracts which might be out-of-the-money are likely to have lower premiums.

An option premium is the upfront fee that’s charged to a buyer of an option. An option that has intrinsic value may have the next premium than an option with no intrinsic value.

Time Value

An option with more time remaining until expiration tends to have the next premium related to it versus an option that’s near its expiry. Options with more time remaining until expiration are likely to have more value because there’s the next probability that there may very well be intrinsic value by expiry. This monetary value embedded within the premium for the time remaining on an options contract is named time value.

In other words, the premium of an option is primarily comprised of intrinsic value and the time value related to the choice. That is why time value can be called extrinsic value.

Time Decay

Over time and because the option approaches its expiration, the time value decreases since there’s less time for an option buyer to earn a profit. An investor wouldn’t pay a high premium for an option that is about to run out since there could be little probability of the choice being in-the-money or having intrinsic value.

The means of an option’s premium declining in value as the choice expiry approaches is named time decay. Time decay is merely the speed of decline in the worth of an option’s premium resulting from the passage of time. Time decay accelerates because the time to expiration draws near.

Higher premiums profit option sellers. Nonetheless, once the choice seller has initiated the trade and has been paid the premium, they typically want the choice to run out worthless in order that they’ll pocket the premium.

In other words, the choice seller doesn’t normally want the choice to be exercised or redeemed. As a substitute, they simply want the income from the choice without having the duty of selling or buying shares of the underlying security.

How Option Sellers Profit

Because of this, time decay or the speed at which the choice eventually becomes worthless works to the advantage of the choice seller. Option sellers look to measure the speed of decline within the time value of an option resulting from the passage of time–or time decay. This measure is named theta, whereby it’s typically expressed as a negative number and is actually the quantity by which an option’s value decreases day-after-day.

Selling options is a positive theta trade, meaning the position will earn more cash as time decay accelerates.

During an option transaction, the client expects the stock to maneuver in a single direction and hopes to take advantage of it. Nonetheless, this person pays each intrinsic and extrinsic value (time value) and must make up the extrinsic value to take advantage of the trade. Because theta is negative, the choice buyer can lose money if the stock stays still or, even perhaps more frustratingly, if the stock moves slowly in the right direction, however the move is offset by time decay.

Nonetheless, time decay works well in favor of the choice seller because not only will it decay a bit each business day; it also works weekends and holidays. It is a slow-moving moneymaker for patient sellers.

Remember, the choice seller has already been paid the premium on day considered one of initiating the trade. Because of this, option sellers are the beneficiaries of a decline in an option contract’s value. As the choice’s premium declines, the vendor of the choice can close out their position with an offsetting trade by buying back the choice at a less expensive premium.

Volatility Risks and Rewards

Option sellers want the stock price to stay in a reasonably tight trading range, or they need it to maneuver of their favor. Because of this, understanding the expected volatility or the speed of price fluctuations within the stock is vital to an option seller. The general market’s expectation of volatility is captured in a metric called implied volatility.

Monitoring changes in implied volatility can be vital to an option seller’s success. Implied volatility is actually a forecast of the potential movement in a stock’s price. If a stock has a high implied volatility, the premium or cost of the choice can be higher.

Implied Volatility

Implied volatility, also referred to as vega, moves up and down depending on the availability and demand for options contracts. An influx of option buying will inflate the contract premium to entice option sellers to take the alternative side of every trade. Vega is a component of the extrinsic value and may inflate or deflate the premium quickly.


Implied volatility graph.

Image by Sabrina Jiang © Investopedia 2020


An option seller could also be short on a contract after which experience an increase in demand for contracts, which, in turn, inflates the worth of the premium and will cause a loss, even when the stock hasn’t moved. Figure 1 is an example of an implied volatility graph and shows how it could actually inflate and deflate at various times.

Most often, on a single stock, the inflation will occur in anticipation of an earnings announcement. Monitoring implied volatility provides an option seller with an edge by selling when it’s high because it would likely revert to the mean.

At the identical time, time decay will work in favor of the vendor too. It is important to recollect the closer the strike price is to the stock price, the more sensitive the choice can be to changes in implied volatility. Due to this fact, the further out of the cash or the deeper in the cash a contract is, the less sensitive it would be to implied volatility changes.

Probability of Success

Option buyers use a contract’s delta to find out how much the choice contract will increase in value if the underlying stock moves in favor of the contract. Delta measures the speed of price change in an option’s value versus the speed of price changes within the underlying stock.

Nonetheless, option sellers use delta to find out the probability of success. A delta of 1.0 means an option will likely move dollar-per-dollar with the underlying stock, whereas a delta of .50 means the choice will move 50 cents on the dollar with the underlying stock.

An option seller would say a delta of 1.0 means you’ve a 100% probability the choice can be at the least 1 cent in the cash by expiration and a .50 delta has a 50% probability the choice can be 1 cent in the cash by expiration. The further out of the cash an option is, the upper the probability of success is when selling the choice without the specter of being assigned if the contract is exercised.


Probability of expiring and delta comparison.
Image by Sabrina Jiang © Investopedia 2020

Sooner or later, option sellers need to determine how essential a probability of success is in comparison with how much premium they’re going to get from selling the choice. Figure 2 shows the bid and ask prices for some option contracts. Notice the lower the delta accompanying the strike prices, the lower the premium payouts. This implies an fringe of some kind must be determined.

As an example, the instance in Figure 2 also includes a unique probability of expiring calculator. Various calculators are used apart from delta, but this particular calculator relies on implied volatility and will give investors a much-needed edge. Nonetheless, using fundamental evaluation or technical evaluation may help option sellers.

Worst-Case Scenarios

Many investors refuse to sell options because they fear worst-case scenarios. The likelihood of some of these events happening could be very small, nevertheless it continues to be essential to know they exist.

First, selling a call option has the theoretical risk of the stock climbing to the moon. While this will likely be unlikely, there’s not upside protection to stop the loss if the stock rallies higher. Call sellers will thus need to find out a degree at which they are going to decide to buy back an option contract if the stock rallies or they could implement any variety of multi-leg option spread strategies designed to hedge against loss.

Nonetheless, selling puts is largely the equivalent of a covered call. When selling a put, remember the danger comes with the stock falling. In other words, the put seller receives the premium and is obligated to purchase the stock if its price falls below the put’s strike price.

The chance for the put seller is that the choice is exercised and the stock price falls to zero. Nonetheless, there’s not an infinite amount of risk since a stock can only hit zero and the vendor gets to maintain the premium as a consolation prize.

It is similar in owning a covered call. The stock could drop to zero, and the investor would lose all the cash within the stock with only the decision premium remaining. Just like the selling of calls, selling puts may be protected by determining a price during which chances are you’ll decide to buy back the put if the stock falls or hedge the position with a multi-leg option spread.

The Bottom Line

Selling options may not have the identical sort of excitement as buying options, nor will it likely be a “home run” strategy. In actual fact, it’s more akin to hitting single after single. Just remember, enough singles will still get you across the bases, and the rating counts the identical.

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