OPTIONS TRADING

Put options are a fundamental type of derivative in options trading, offering the right to sell and the obligation to buy an underlying asset at a predetermined price within a set time frame. In Canada, put options are widely used by investors to manage downside risk, hedge portfolios, or take advantage of falling stock prices.

The value of a put is influenced by factors such as the strike price, time until expiration, and market volatility, all of which determine the option's premium. Understanding how puts work, including key terms like in the money (ITM), at the money (ATM), and out of the money (OTM), provides a foundation for analyzing potential payoffs and obligations. This guide breaks down the mechanics of put options with clear examples and practical illustrations for Canadian investors.

The content in this guide is for informational purposes only and does not constitute financial or investment advice, or recommendations for how to use any brokerage platform. The examples provided are illustrative only. They do not represent actual scenarios or guarantee any specific outcome.

What is a Put Option?

A put option is a standardized contract traded on regulated exchanges and cleared through a central clearinghouse, which helps ensure both parties meet their obligations. Each contract has set terms, making the market transparent and consistent.

The main difference in a put option comes down to rights and obligations:

• Long put gives the buyer the right, but not the obligation, to sell the underlying asset at the strike price by expiration.
• Short put creates an obligation for the seller to buy the underlying if the option is assigned. Assignment occurs when the buyer exercises the put.

Key parts of a put contract include:

• Underlying asset: The stock or security the option represents.
• Strike price: The agreed sale price of the asset.
• Expiration date: The last day the option could be exercised.
• Premium: The price paid for the contract.
• Contract multiplier: Shows how many units of the asset the contract covers.

The value of a put is made up of:

• Intrinsic value: The difference between the strike price and the current price of the underlying, if positive.
• Time value: The extra premium reflecting the possibility that the underlying price could change before expiration. Factors include volatility and remaining time.

Within Canadian options trading, put options are one of the two primary derivatives, alongside calls. They provide a structured way for investors to manage risk or take positions on potential price movements, while standardized contracts and exchange rules make them clear, reliable, and accessible in the market.

How Put Premium Works

The premium of a put option is the price paid by the buyer to the seller for the rights embedded in the contract. This value is not fixed and could change based on several factors in the market. Understanding what drives a put's premium helps explain why different puts on the same underlying might cost more or less.

What Drives Put Premiums

Several key factors influence the cost of a put option:

• Underlying price level: The current price of the asset relative to the strike directly affects intrinsic value. A lower stock price relative to the strike increases the premium for ITM puts.
• Time to expiry: More time until expiration increases the chance the option will move into the money, generally raising the premium.
• Implied volatility: Higher expected volatility means greater potential price swings, increasing the value of the put.
• Interest rates and dividends: Rising interest rates could slightly decrease put premiums, while anticipated dividends might also affect the pricing because they could lower the stock price.

Moneyness for Puts

Moneyness describes whether a put has intrinsic value at the current price:

• In the money: Strike price is above the underlying price; the put has intrinsic value.
• At the money: Strike price is approximately the same as the underlying price; minimal intrinsic value.
• Out of the money: Strike price is below the underlying price; no intrinsic value, only time value.

In summary, a put option's premium reflects both intrinsic value and time value. Intrinsic value measures how much the option would be worth if exercised immediately—the difference between the strike price and the current price of the underlying (never less than zero). Time value represents the additional amount due to the possibility of price changes before expiration. Together, these components explain why put premiums could move even when the strike price and expiration date remain the same.

Key Terms

• Put option: A contract giving the holder the right to sell the underlying asset or the obligation to buy the underlying asset at a specified price by the expiration date.
• Premium: The price paid by the buyer to acquire a put option, representing its total value and the amount received by the seller of the put option.
• Strike: The price at which the underlying asset could be sold or bought.
• Expiration: The final date on which the put option could be exercised.
• Contract multiplier: The factor used to calculate the total value of a put option position, typically reflecting the number of underlying units per contract.
• In the money (ITM): A put option with a strike price above the current underlying price, giving it intrinsic value.
• At the money (ATM): A put option with a strike price approximately equal to the underlying price, with little or no intrinsic value.
• Out of the money (OTM): A put option with a strike price below the underlying price, having no intrinsic value.
• Intrinsic value: The immediate value of a put option if exercised.
• Time value: The portion of a put premium that reflects the potential for future price movement before expiration.
• Bid: The highest price a buyer is willing to pay for a put option.
• Ask: The lowest price a seller is willing to accept for a put option.
• Spread: The difference between the bid and ask prices of a put option.
• Open interest: The total number of outstanding put option contracts that have not been exercised or closed.
• Volume: The number of put option contracts traded during a specific period, often daily.
• Implied volatility: The market's expectation of the underlying asset's price fluctuations, influencing the put premium.
• Exercise: The act of using the right to sell the underlying asset at the strike price.
• Assignment: The process by which the seller of a put option is required to buy the underlying asset when the option is exercised.
• American vs. European style: American-style puts could be exercised any time before expiration, while European-style puts could only be exercised on the expiration date.
• Options chain (put panel): A display of all available put options for a given underlying, showing strike prices, expiration dates, premiums, and other data.

What are Put Payoffs?

A long put gives the holder the right to sell the underlying asset at the strike price. The potential profit increases as the asset's price falls, while the maximum loss is limited to the premium paid. Conceptually, the payoff slopes downward: the lower the underlying price at expiration, the more the option is worth.

A short put creates an obligation for the seller to buy the underlying if the option is exercised. Here, the maximum gain is limited to the premium received, while losses grow if the underlying price drops below the strike. Assignment happens when the long put is exercised, requiring the short put seller to purchase the asset at the agreed strike price. These outcomes reflect the terms of the contract rather than investor decisions.

Examples of Put Options

The following examples provide a simple visual for how long and short puts behave at expiration under different market prices. They focus on conceptual outcomes rather than exact returns and do not represent any specific outcome or recommendation.

Example 1–Long Put at Expiration

The table below shows how a long put option behaves at expiration across different underlying price scenarios. The intrinsic value increases as the underlying price falls below the strike, while the profit/loss reflects the premiums paid.

Illustrative only. Commissions/fees not shown.

Example 2–Short Put at Expiration

The following table illustrates a short put's payoff and potential obligations at expiration. The obligation state shows whether the seller might be assigned the underlying, while the P/L reflects the premium received vs. the intrinsic value.

Illustrative only. Commissions/fees not shown.

Reading the Options Chain (Put Panel)

Put options are typically displayed in the put panel of an options chain, a structured table that shows all available contracts for a given underlying asset. The put panel is separate from the call panel, making it easier to focus on the respective derivatives.

Common columns in a put panel include:

• Strike: The price at which the underlying could be sold or bought.
• Bid: The highest price a buyer is willing to pay for the put.
• Ask: The lowest price a seller will accept.
• Last: The most recent transaction price for the option.
• Volume: The number of contracts traded in the current period.
• Open Interest: The total number of outstanding contracts that have not been exercised or closed.
• Expiry Selector: A dropdown or filter to choose contracts for a specific expiration date.

Some platforms also shade ITM puts for quick reference, helping users visually distinguish options with intrinsic value. Moneyness is often displayed directly on the put side through colour coding, bolding, or a separate column.

Options chains provide a snapshot of market activity and pricing for puts, helping investors analyze premiums, liquidity, and potential payoffs. For a more interactive understanding, first-party tutorials from broker platforms could demonstrate navigating the put panel and interpreting the data in real-time.

Reading the put panel carefully is an essential step before considering any positions, allowing users to understand contract terms, premium ranges, and market interest at a glance.

Placing a Put Trade

Placing a put option trade involves a series of steps that are consistent across most trading platforms, even though labels and interfaces might vary. The process focuses on selecting the right contract, specifying the order, and monitoring execution.

1. Locate the options chain and open the puts panel: Start by finding the options chain for the underlying asset. Switch to the put panel to view all available put contracts.
2. Select expiry and strike: Choose the expiration date and strike price for the put option based on the desired position.
3. Choose side and quantity: Indicate whether the order is to buy (long put) or sell (short put) and enter the number of contracts. Single-leg trades are the most common starting point.
4. Select order type and time-in-force: Pick an order type such as market, limit, or stop, and specify how long the order remains active (day, GTC, etc.).
5. Review details: Confirm the selected strike, expiry, quantity, premium, and total cost or credit.
6. Submit the order: Send the order for processing. Most platforms will provide an acknowledgment and expected execution details.
7. Monitor orders: Track the order in the platform's blotter or order management section. Watch for fills, partial executions, or cancellations and make adjustments if needed.

Following these steps ensures trades are placed with clarity and accuracy while maintaining a neutral, structured approach. Understanding the process before entering a trade helps avoid errors and improves awareness of order execution and monitoring requirements.

Understanding Expiration, Exercise, and Assignment

Exercise (Holder has the Right to Sell)

Exercising a put means the holder chooses to use the right to sell the underlying asset at the strike price. The timing of exercise depends on the style of the option. American-style puts could be exercised any time up to the expiration date, while European-style puts could only be exercised on the expiration date itself.

Each trading platform might have its own cut-off windows for submitting exercise instructions, typically a few hours before market close on the relevant day. Exercising a put converts the contract into a transaction in the underlying asset, transferring it from the holder to the assigned party at the agreed strike price.

Assignment (Writer Obligation)

An assignment occurs when a short put is exercised by the holder. This triggers the seller's obligation to buy the underlying asset at the strike price. Brokers usually notify the writer of an assignment through their platform or account dashboard. Operationally, the assignment is treated as a standard purchase of the underlying, with the necessary funds and shares transferred according to the contract. The process is automatic once the holder exercises, and the seller's role is limited to fulfilling the obligation as defined in the contract terms.

ITM vs. OTM Puts at Expiration

At expiration, whether a put is ITM or OTM usually determines what happens. ITM puts, where the strike price is higher than the stock price, are often exercised, meaning the holder sells the shares at the strike price or receives a cash settlement. OTM puts, where the strike is lower than the stock price, usually expire worthless because selling at the strike would not make sense. Puts that are ATM or close to the stock price might be exercised or left to expire, depending on broker rules and holder decisions. This is why assignments mainly happen for ITM puts, while OTM puts generally require no action.

Understanding Risks and Mechanics of Put Options

Put options come with both market risk and operational considerations. The checklist below highlights common factors that affect how puts behave, especially as expiration approaches.

• Gap risk near the strike: Prices could move sharply between trading sessions, particularly around earnings or major news. When this happens close to expiration, a put could shift quickly between ITM and OTM, changing exercise or assignment outcomes.
• Time decay on OTM puts: Out of the money puts lose value as expiration approaches if the underlying price does not move lower. This time decay accelerates in the final days, which could reduce the option's premium even if the stock price is relatively stable.
• Liquidity and bid/ask spreads: Some put options trade less frequently than others. Lower liquidity could result in wider bid/ask spreads, which might increase trading costs or make it harder to enter or exit a position at a specific price.
• Early assignment (American-style puts): Most equity options in Canada are American-style, meaning they could be exercised before expiration. While early assignment is less common, it could occur, particularly when a put is deep in the money.
• Corporate actions: Events such as stock splits, dividends, or mergers could change option terms. Adjustments might affect the strike price, contract multiplier, or deliverables, altering how a put behaves after the action.
• Record-keeping and platform notices: Brokers provide notices related to exercises, assignments, expirations, and contract adjustments. Monitoring account messages and maintaining records helps avoid missed deadlines or unexpected outcomes.