Essential Options Trading Guide

Options trading may seem overwhelming at first, but it's easy to understand if you know a few key points. Investor portfolios are usually constructed with several asset classes. These may be stocks, bonds, ETFs, and even mutual funds.

Options are another asset class, and when used correctly, they offer many advantages that trading stocks and ETFs alone cannot.

What Are Options?

Options are contracts that give the bearer the right—but not the obligation—to either buy or sell an amount of some underlying asset at a predetermined price at or before the contract expires. Like most other asset classes, options can be purchased with brokerage investment accounts.

Options are powerful because they can enhance an individual’s portfolio. They do this through added income, protection, and even leverage. Depending on the situation, there is usually an option scenario appropriate for an investor’s goal. A popular example would be using options as an effective hedge against a declining stock market to limit downside losses. In fact, options were really invented for hedging purposes. Hedging with options is meant to reduce risk at a reasonable cost. Here, we can think of using options like an insurance policy. Just as you insure your house or car, options can be used to insure your investments against a downturn.

Imagine that you want to buy technology stocks, but you also want to limit losses. By using put options, you could limit your downside risk and cost-effectively enjoy all the upside. For short sellers, call options can be used to limit losses if the underlying price moves against their trade—especially during a short squeeze.

Options can also be used for speculation. Speculation is a wager on future price direction. A speculator might think the price of a stock will go up, perhaps based on fundamental analysis or technical analysis. A speculator might buy the stock or buy a call option on the stock. Speculating with a call option—instead of buying the stock outright—is attractive to some traders because options provide leverage. An out-of-the-money call option may only cost a few dollars or even cents compared to the full price of a $100 stock.

How Options Work

In terms of valuing option contracts, it is essentially all about determining the probabilities of future price events. The more likely something is to occur, the more expensive an option that profits from that event would be. For instance, a call value goes up as the stock (underlying) goes up. This is the key to understanding the relative value of options.

The less time there is until expiry, the less value an option will have. This is because the chances of a price move in the underlying stock diminish as we draw closer to expiry. This is why an option is a wasting asset. If you buy a one-month option that is out of the money, and the stock doesn’t move, the option becomes less valuable with each passing day. Because time is a component of the price of an option, a one-month option is going to be less valuable than a three-month option. This is because with more time available, the probability of a price move in your favor increases, and vice versa.

Accordingly, the same option strike that expires in a year will cost more than the same strike for one month. This wasting feature of options is known as time decay. The same option will be worth less tomorrow than it is today if the price of the stock doesn’t move.

Volatility also increases the price of an option. This is because uncertainty pushes the odds of an outcome higher. If the volatility of the underlying asset increases, larger price swings increase the possibility of substantial moves both up and down. Greater price swings will increase the chances of an event occurring. Therefore, the greater the volatility, the greater the price of the option. Options trading and volatility are intrinsically linked to each other in this way.

On most U.S. exchanges, a stock option contract is the option to buy or sell 100 shares; that's why you must multiply the contract premium by 100 to get the total amount you’ll have to spend to buy the call.

The majority of the time, holders choose to take their profits by trading out (closing out) their position. This means that option holders sell their options in the market, and writers buy their positions back to close. According to the Cboe, over the long term, more than seven in 10 option contracts are closed out before expiring, about another two in 10 expire without value, while about one in 20 get exercised.

Fluctuations in option prices can be explained by intrinsic value and extrinsic value, which is also known as time value. An option's premium is the combination of its intrinsic value and time value. Intrinsic value is the in-the-money amount of an options contract, which, for a call option, is the amount above the strike price that the stock is trading. Time value represents the added value an investor has to pay for an option above the intrinsic value. This is the extrinsic value or time value. So the price of the option in our example can be thought of as the following:

In real life, options almost always trade at some level above their intrinsic value, because the probability of an event occurring is never absolutely zero, even if it is highly unlikely.

Types of Options: Calls and Puts

Options are a type of derivative security. An option is a derivative because its price is intrinsically linked to the price of something else. If you buy an options contract, it grants you the right but not the obligation to buy or sell an underlying asset at a set price on or before a certain date.

A call option gives the holder the right to buy a stock and a put option gives the holder the right to sell a stock. Think of a call option as a down payment on a future purchase.

Call Options

A call option gives the holder the right, but not the obligation, to buy the underlying security at the strike price on or before expiration. A call option will therefore become more valuable as the underlying security rises in price (calls have a positive delta).

A long call can be used to speculate on the price of the underlying rising, since it has unlimited upside potential but the maximum loss is the premium (price) paid for the option.

Call Option Example

A potential homeowner sees a new development going up. That person may want the right to purchase a home in the future but will only want to exercise that right after certain developments around the area are built.

The potential homebuyer would benefit from the option of buying or not. Imagine they can buy a call option from the developer to buy the home at say $400,000 at any point in the next three years. Well, they can—you know it as a non-refundable deposit. Naturally, the developer wouldn’t grant such an option for free. The potential homebuyer needs to contribute a down payment to lock in that right.

With respect to an option, this cost is known as the premium. It is the price of the option contract. In our home example, the deposit might be $20,000 that the buyer pays the developer. Let’s say two years have passed, and now the developments are built and zoning has been approved. The homebuyer exercises the option and buys the home for $400,000 because that is the contract purchased.

The market value of that home may have doubled to $800,000. But because the down payment locked in a predetermined price, the buyer pays $400,000. Now, in an alternate scenario, say the zoning approval doesn’t come through until year four. This is one year past the expiration of this option. Now the homebuyer must pay the market price because the contract has expired. In either case, the developer keeps the original $20,000 collected.

Put Options

Opposite to call options, a put gives the holder the right, but not the obligation, to instead sell the underlying stock at the strike price on or before expiration. A long put, therefore, is a short position in the underlying security, since the put gains value as the underlying price falls (they have a negative delta). Protective puts can be purchased as a sort of insurance, providing a price floor for investors to hedge their positions.

Put Option Example

Now, think of a put option as an insurance policy. If you own your home, you are likely familiar with the process of purchasing homeowner’s insurance. A homeowner buys a homeowner’s policy to protect their home from damage. They pay an amount called a premium for a certain amount of time, let’s say a year. The policy has a face value and gives the insurance holder protection in the event the home is damaged.

What if, instead of a home, your asset was a stock or index investment? Similarly, if an investor wants insurance on their S&P 500 index portfolio, they can purchase put options. An investor may fear that a bear market is near and may be unwilling to lose more than 10% of their long position in the S&P 500 index. If the S&P 500 is currently trading at $2,500, they can purchase a put option giving them the right to sell the index at $2,250, for example, at any point in the next two years.

If in six months the market crashes by 20% (500 points on the index), they have made 250 points by being able to sell the index at $2,250 when it is trading at $2,000—a combined loss of just 10%. In fact, even if the market drops to zero, the loss would only be 10% if this put option is held. Again, purchasing the option will carry a cost (the premium), and if the market doesn’t drop during that period, the maximum loss on the option is just the premium spent.

Uses of Call and Puts Options

Call options and put options are used in a variety of situations. The table below outlines some use cases for call and put options.

How to Trade Options

Many brokers today allow access to options trading for qualified customers. If you want access to options trading you will have to be approved for both margin and options with your broker. Once approved, there are four basic things you can do with options:

1. Buy (long) calls
2. Sell (short) calls
3. Buy (long) puts
4. Sell (short) puts

Buying stock gives you a long position. Buying a call option gives you a potential long position in the underlying stock. Short-selling a stock gives you a short position. Selling a naked or uncovered call gives you a potential short position in the underlying stock.

Buying a put option gives you a potential short position in the underlying stock. Selling a naked or unmarried put gives you a potential long position in the underlying stock. Keeping these four scenarios straight is crucial.

People who buy options are called holders and those who sell options are called writers of options. Here is the important distinction between holders and writers:

1. Call holders and put holders (buyers) are not obligated to buy or sell. They have the choice to exercise their rights. This limits the risk of buyers of options to only the premium spent.
2. Call writers and put writers (sellers), however, are obligated to buy or sell if the option expires in the money (more on that below). This means that a seller may be required to make good on a promise to buy or sell. It also implies that option sellers have exposure to more—and in some cases, unlimited—risks. This means writers can lose much more than the price of the options premium.

Options can also generate recurring income. Additionally, they are often used for speculative purposes, such as wagering on the direction of a stock.

Note that options trading usually comes with trading commissions: often a flat per-trade fee plus a smaller amount per contract. For instance, $4.95 + $0.50 per contract.

Examples of Trading Options

Call options and put options can only function as effective hedges when they limit losses and maximize gains. Suppose you’ve purchased 100 shares of Company XYZ’s stock, betting that its price will increase to $20. Therefore, your total investment is $1,000. To hedge against the risk that the price might decline, you purchase one put option (each options contract represents 100 shares of underlying stock) with a strike price of 10, each worth $2 (for a total of $200).

Consider the situation when the stock’s price goes your way (i.e., it increases to $20). In such a scenario, your put options expire worthless. But your losses are limited to the premium paid (in this case, $200). If the price declines (as you bet it would in your put options), then your maximum gains are also capped. This is because the stock price cannot fall below zero, and therefore, you cannot make more money than the amount you make after the stock’s price falls to zero.

Now, consider a situation in which you’ve bet that XYZ’s stock price will decline to $5. To hedge against this position, you’ve purchased call stock options, betting that the stock’s price will increase to $20. What happens if the stock’s price goes your way (i.e., it declines to $5)? Your call options will expire worthless and you will have losses worth $200. There are no upper limits on XYZ’s price after it takes off. Theoretically, XYZ can go all the way to $100,000 or higher. Therefore, your gains are not capped and are unlimited.

The table below summarizes gains and losses for options buyers.

Using Long Calls

As the name indicates, going long on a call involves buying call options, betting that the price of the underlying asset will increase with time. For example, suppose a trader purchases a contract with 100 call options for a stock that's currently trading at $10. Each option is priced at $2. Therefore, the total investment in the contract is $200. The trader will recoup her costs when the stock’s price reaches $12.

Thereafter, the stock’s gains are profits for her. There are no upper bounds on the stock’s price, and it can go all the way up to $100,000 or even further. A $1 increase in the stock’s price doubles the trader’s profits because each option is worth $2. Therefore, a long call promises unlimited gains. If the stock goes in the opposite price direction (i.e., its price goes down instead of up), then the options expire worthless and the trader loses only $200. Long calls are useful strategies for investors when they are reasonably certain a given stock’s price will increase.    

Writing Covered Calls

In a short call, the trader is on the opposite side of the trade (i.e., they sell a call option as opposed to buying one), betting that the price of a stock will decrease in a certain time frame. Because it is a naked call, a short call can have unlimited gains because if the price goes the trader’s way, then they could rake in money from call buyers.

But writing a call without owning actual stock can also mean significant losses for the trader because, if the price doesn’t go in the planned direction, then they would have to spend a considerable sum to purchase and deliver the stock at inflated prices.

A covered call limits their losses. In a covered call, the trader already owns the underlying asset. Therefore, they don’t need to purchase the asset if its price goes in the opposite direction. Thus, a covered call limits losses and gains because the maximum profit is limited to the amount of premiums collected. Covered calls writers can buy back the options when they are close to in the money. Experienced traders use covered calls to generate income from their stock holdings and balance out tax gains made from other trades.      

Long Puts

A long put is similar to a long call except that the trader will buy puts, betting that the underlying stock’s price will decrease. Suppose a trader purchases a one 10-strike put option (representing the right to sell 100 shares at $10) for a stock trading at $20. Each option is priced at a premium of $2. Therefore, the total investment in the contract is $200. The trader will recoup those costs when the stock’s price falls to $8 ($10 strike - $2 premium).

Thereafter, the stock’s losses mean profits for the trader. But these profits are capped because the stock’s price cannot fall below zero. The losses are also capped because the trader can let the options expire worthless if prices move in the opposite direction. Therefore, the maximum losses that the trader will experience are limited to the premium amounts paid. Long puts are useful for investors when they are reasonably certain that a stock’s price will move in their desired direction.

Short Puts

In a short put, the trader will write an option betting on a price increase and sell it to buyers. In this case, the maximum gains for a trader are limited to the premium amount collected. However, the maximum losses can be unlimited because she will have to buy the underlying asset to fulfill her obligations if buyers decide to exercise their option.

Despite the prospect of unlimited losses, a short put can be a useful strategy if the trader is reasonably certain that the price will increase. The trader can buy back the option when its price is close to being in the money and generates income through the premium collected.

Combinations

The simplest options position is a long call (or put) by itself. This position profits if the price of the underlying rises (falls), and your downside is limited to the loss of the option premium spent.

If you simultaneously buy a call and put option with the same strike and expiration, you’ve created a straddle. This position pays off if the underlying price rises or falls dramatically; however, if the price remains relatively stable, you lose premium on both the call and the put. You would enter this strategy if you expect a large move in the stock but are not sure in which direction.

Basically, you need the stock to have a move outside of a range. A similar strategy betting on an outsized move in the securities when you expect high volatility (uncertainty) is to buy a call and buy a put with different strikes and the same expiration—known as a strangle. A strangle requires larger price moves in either direction to profit but is also less expensive than a straddle.

On the other hand, being short a straddle or a strangle (selling both options) would profit from a market that doesn’t move much.

Spreads

Spreads use two or more options positions of the same class. They combine having a market opinion (speculation) with limiting losses (hedging). Spreads often limit potential upside as well. Yet these strategies can still be desirable since they usually cost less when compared to a single options leg. There are many types of spreads and variations on each. Here, we just discuss some of the basics.

Vertical spreads involve selling one option to buy another. Generally, the second option is the same type and same expiration but a different strike. A bull call spread, or bull call vertical spread, is created by buying a call and simultaneously selling another call with a higher strike price and the same expiration. The spread is profitable if the underlying asset increases in price, but the upside is limited due to the short-call strike. The benefit, however, is that selling the higher strike call reduces the cost of buying the lower one. Similarly, a bear put spread, or bear put vertical spread, involves buying a put and selling a second put with a lower strike and the same expiration. If you buy and sell options with different expirations, it is known as a calendar spread or time spread.

A butterfly spread consists of options at three strikes, equally spaced apart, wherein all options are of the same type (either all calls or all puts) and have the same expiration. In a long butterfly, the middle strike option is sold and the outside strikes are bought in a ratio of 1:2:1 (buy one, sell two, buy one). If this ratio does not hold, it is no longer a butterfly. The outside strikes are commonly referred to as the wings of the butterfly, and the inside strike as the body. The value of a butterfly can never fall below zero. Closely related to the butterfly is the condor—the difference is that the middle options are not at the same strike price.

Synthetics

Combinations are trades constructed with both a call and a put. There is a special type of combination known as a “synthetic.” The point of a synthetic is to create an options position that behaves like an underlying asset but without actually controlling the asset. Why not just buy the stock? Maybe some legal or regulatory reason restricts you from owning it. But you may be allowed to create a synthetic position using options. For instance, if you buy an equal amount of calls as you sell puts at the same strike and expiration, you have created a synthetic long position in the underlying.

Boxes are another example of using options in this way to create a synthetic loan, an options spread that effectively behave like a zero-coupon bond until it expires.

American vs. European Options

American options can be exercised at any time between the date of purchase and the expiration date. European options are different from American options in that they can only be exercised at the end of their lives on their expiration date.

The distinction between American and European options has nothing to do with geography, only with early exercise. Many options on stock indexes are of the European type. Because the right to exercise early has some value, an American option typically carries a higher premium than an otherwise identical European option. This is because the early exercise feature is desirable and commands a premium.

There are also exotic options, which are exotic because there might be a variation in the payoff profiles from the plain vanilla options. Or they can become totally different products altogether with "optionality" embedded in them. For example, binary options have a simple payoff structure that is determined if the payoff event happens regardless of the degree.

Other types of exotic options include knock-out, knock-in, barrier options, lookback options, Asian options, and Bermuda options. Again, exotic options are typically for professional derivatives traders.

Short-Term Options vs. Long-Term Options

Options can also be categorized by their duration. Short-term options are those that generally expire within a year. Long-term options with expirations greater than a year are classified as long-term equity anticipation securities, or LEAPs. LEAPs are identical to regular options except that they have longer durations.

Options can also be distinguished by when their expiration date falls. Sets of options now expire weekly on each Friday, at the end of the month, or even on a daily basis. Index and ETF options also sometimes offer quarterly expiries.

Reading Options Tables

More and more traders are finding option data through online sources. Though each source has its own format for presenting the data, the key components of an options table (or options chain) generally include the following variables:

• Volume (VLM) simply tells you how many contracts of a particular option were traded during the latest session.
• The "bid" price is the latest price level at which a market participant wishes to buy a particular option.
• The "ask" price is the latest price offered by a market participant to sell a particular option.
• Implied Bid Volatility (IMPL BID VOL) can be thought of as the future uncertainty of price direction and speed. This value is calculated by an option-pricing model such as the Black-Scholes model and represents the level of expected future volatility based on the current price of the option.
• An Open Interest (OPTN OP) number indicates the total number of contracts of a particular option that have been opened. Open interest decreases as open trades are closed.
• Delta can be thought of as a probability. For instance, a 30-delta option has roughly a 30% chance of expiring in the money. Delta also measures the option's sensitivity to immediate price changes in the underlying. The price of a 30-delta option will change by 30 cents if the underlying security changes its price by $1.
• Gamma is the speed the option for moving in or out of the money. Gamma can also be thought of as the movement of the delta.
• Vega is a Greek value that indicates the amount by which the price of the option would be expected to change based on a one-point change in implied volatility.
• Theta is the Greek value that indicates how much value an option will lose with the passage of one day.
• The "strike price" is the price at which the buyer of the option can buy or sell the underlying security if they choose to exercise the option.

Above, a 2024 Example of Options data page from the Cboe for Apple Inc.

Options Risks: The "Greeks"

Because options prices can be modeled mathematically with a model such as the Black-Scholes model, many of the risks associated with options can also be modeled and understood. This particular feature of options actually makes them arguably less risky than other asset classes, or at least allows the risks associated with options to be understood and evaluated. Individual risks have been assigned Greek letter names, and are sometimes referred to simply as "the Greeks."

The basic Greeks include:

• Delta: option's price sensitivity to price changes in the underlying
• Gamma: option's delta sensitivity to price changes in the underlying
• Theta: time decay, or option's price sensitivity to the passage of time
• Vega: option's price sensitivity to changes in volatility
• Rho: option's price sensitivity to interest rate changes

The Bottom Line

Options do not have to be difficult to understand when you grasp their basic concepts. Options can provide opportunities when used correctly and can be harmful when used incorrectly.