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Stock splits can be a significant event for investors, and it's essential to understand how they impact options. A stock split occurs when a company divides its existing shares into a larger number of shares.
The number of shares outstanding increases after a stock split, but the total market value of the company remains the same. This means that the value of each share decreases proportionally.
For example, if a company has 100 shares outstanding and splits 2-for-1, the number of shares will double to 200. However, the total market value of the company will remain the same.
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What Is a Split?
A split is a way a company's board of directors can increase the number of shares outstanding while lowering the share price, making the stock more attainable to smaller investors.
Stock splits can be a 2-for-1 split, where for every share held as of the record date, an investor will receive two shares as of the ex-date, or a 20-for-1 split, where investors receive 20 shares of the stock for every one share they owned, as seen in Amazon and Google's parent company Alphabet.
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A company's value doesn't change in a split, but the number of shares and share price do. For example, if a company's shares are trading at $400 per share, and an investor holds 100 shares, after a 4-for-1 split, they'll hold 400 shares, each worth $100.
Stock splits can be "whole" splits, such as 3:1 or 4:1, where the share price is reduced by the split ratio, or "odd" splits, such as 3:2 or 5:4, where the share price is also reduced by the split ratio.
Here are some common types of stock splits and how they affect the share price:
A "reverse" stock split, on the other hand, reduces the number of shares and increases the share price, often done to meet the minimum stock price required for a company to be listed on an exchange.
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How Options Are Affected
A stock split can affect options in several ways. The number of shares in an option contract is multiplied by the split ratio, so if a stock splits 2-for-1, an option contract for 100 shares becomes two contracts for 200 shares.
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The strike price of an option is adjusted by dividing the old strike price by the split ratio. For example, a $102 strike price becomes $51 after a 2-for-1 split.
A reverse stock split has the opposite effect, increasing the strike price and decreasing the number of shares in an option contract. A 1:4 reverse split would increase the strike price from $102 to $408 and decrease the number of shares from 100 to 25.
The delta of an option, which measures its sensitivity to the underlying stock price, can increase significantly after a stock split. In a 20:1 split, the total delta of an option can rise by a factor of twenty, making it twenty-times more reactive to a $1 change in stock price.
The gamma of an option, which measures its sensitivity to changes in the underlying stock price, can also increase significantly after a stock split. In a 20:1 split, the gamma of an option can increase by a factor of forty, making it much more volatile.
A stock split can have a significant impact on options, and option holders need to be aware of these changes to make informed decisions. The effects of a stock split on options can be substantial, and understanding these changes is crucial for successful trading.
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Options Contract Adjustments
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Options contract adjustments can be triggered by stock splits, dividends, distributions, mergers, and acquisitions.
The Depository Trust & Clearing Corporation (DTCC) determines how shares will be adjusted, and for options, the Options Clearing Corporation (OCC) makes adjustments on a case-by-case basis.
The OCC typically modifies options for stock splits based on a few standard adjustments, including market adjustment, whole splits, and odd splits.
Here are some general guidelines for how options contract adjustments work for different types of splits:
In the case of a four-for-one split, for example, the number of contracts would increase by four, the strike price would be reduced by four, and the deliverable would remain the same.
Process in Place
The process in place for options contract adjustments is managed by two key players: the Depository Trust & Clearing Corporation (DTCC) and the Options Clearing Corporation (OCC). The DTCC determines how shares will be adjusted before and after a corporate action like a stock split.
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These organizations work together to ensure that options contracts are adjusted fairly and consistently. For whole splits, such as 3:1 or 4:1, the multiplier is increased by the split ratio. For example, a 4:1 split would increase the multiplier from 100 to 400.
The OCC makes adjustments on a case-by-case basis, but options are typically modified for stock splits based on a few standard adjustments. Investors can confirm these adjustments via the OCC website.
Here are the standard adjustments made by the OCC for whole splits:
In the case of odd splits, such as 3:2 or 5:4, the number of contracts typically stays the same, and the strike price is adjusted. The deliverable may also change.
Options
Options contracts can be affected by stock splits in a few key ways. When a stock splits, the option contract will multiply the split ratio by 100, effectively doubling the number of shares that can be purchased.
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The strike price of the option contract will also be adjusted, by dividing the old strike price by the split ratio. For example, if the old strike price was $102 and the split ratio was 2-for-1, the new strike price would be $51.
The delta and gamma of an option contract are also affected by stock splits. Delta measures the rate of change in an option's premium per $1 change in the underlying asset, while gamma measures the rate of change in an option's delta according to each $1 move in the underlying asset's price.
After a stock split, the delta and gamma of an option contract can increase significantly. In the example of a 20:1 stock split, the total delta increased by a factor of twenty, from 50 to 1000. This means that the options in question are twenty-times more reactive to a $1 change in stock price.
The effects of a stock split on an option's gamma are even more pronounced. In the example, the gamma increased from 0.002 to 0.04, leading to an overall gamma increase of forty-times. This can make a massive difference for option holders, particularly those using multi-legged options strategies like spreads and condors.
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Here's a quick summary of how stock splits affect option contracts:
- The number of shares in an option contract is multiplied by the split ratio.
- The strike price of the option contract is adjusted by dividing the old strike price by the split ratio.
- The delta and gamma of an option contract can increase significantly after a stock split.
- The effects of a stock split on an option's gamma are particularly pronounced, leading to a large increase in overall gamma.
It's worth noting that the effects of a stock split on an option contract can vary depending on the specific split ratio and the underlying asset. However, in general, stock splits can have a significant impact on option contracts and should be taken into account when trading or holding options.
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What Is a Contract Adjustment?
A contract adjustment is a change made to the terms of an equity option contract due to a corporate action, such as a stock split, merger, or takeover. This adjustment ensures that the contract remains valid and reflects the new terms of the underlying stock.
The goal of a contract adjustment is to make the option contract "whole" again, meaning it's adjusted to account for the change in the underlying stock's value. This is typically done by modifying the strike price, contract multiplier, and deliverable.
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For example, if a stock splits 2-for-1, the option contract will multiply the split ratio by 100, resulting in two contracts of 100 shares each. The new strike price is found by dividing the old strike price by the split ratio, so the strike price would drop from $102 to $51.
There are certain events that can trigger a contract adjustment, including stock splits, dividends, distributions, mergers, and acquisitions. The specific terms affected by the adjustment depend on the event announced.
Here's a breakdown of the possible adjustments:
- Deliverable: May include proportionate amounts of cash, similar shares of the same stock, or other securities
- Strike prices: May be adjusted based on the split ratio
- Contract multiplier: May be increased or remain the same, depending on the type of split
- Option symbol: May be modified to reflect the new terms of the contract
It's essential to be aware of any contract adjustments that may affect your option position, as they can have a significant impact on your financials.
Fractional Share
Fractional Share Options can be a challenge, especially with uneven splits like 5-for-2 or 3-for-2. Traders can't hold fractional option contracts.
A 3-for-2 split, for instance, means your contract jumps from 100 to 150 shares, and your strike price would be $68/share. The expiration date remains the same.
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You're supposed to end up in an equal position as you started, but holding more contracts can amplify losses if the price declines. A $1 change in the underlying stock value will have a larger proportional change on the call option's value.
The reduction in stock price can change human-perceived support and resistance levels.
Impact on Options Trading
A stock split can have a significant impact on options trading, making it a bit more complicated than a traditional stock split.
A conventional stock split is a fairly clean increase of position size and a strike price adjustment, but a non-standard corporate action may not be as straightforward.
You'll need to multiply the split ratio by the number of shares in your option contract to determine the new number of shares, as seen in a 2-for-1 split.
This can result in a lower strike price, as the old strike price is divided by the split ratio, dropping from $102 to $51/share in our example.
A reverse split, on the other hand, will decrease the number of shares in your contract and increase the strike price, making the $400 level less mentally important.
Stock splits can also increase volume and implied volatility, making the option more liquid and easier to trade.
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Increase Volume
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Stock splits can have a significant impact on options trading, particularly when it comes to volume. Stock splits tend to increase volume.
This is because a stock split makes the option more affordable and accessible to a wider range of investors, which can lead to more participation in the market. More participation means more volume.
As a result, higher option volume can have an amplifying effect on implied volatility, which is directly related to the extrinsic value priced into an option. Implied volatility increases as demand for an option rises.
Do Options Matter?
Options trading can be a complex and nuanced topic, but one question stands out: do options matter? The answer is yes, options can have a significant impact on trading outcomes.
Options are a type of financial derivative that gives the buyer the right, but not the obligation, to buy or sell an underlying asset at a specified price. This can provide a level of flexibility and protection that may not be available with other investment products.
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The strike price of an option is the price at which the option can be exercised, and it's a critical factor in determining the option's value. A higher strike price can result in a lower option price, making it more attractive to buyers.
In some cases, options can be used to hedge against potential losses, as seen in the article section on "Hedging with Options." This can be especially useful for traders who are concerned about market volatility.
The time value of an option, which is the amount of time remaining before the option expires, can also have a significant impact on its value. As the expiration date approaches, the time value of the option decreases, making it less valuable.
Frequently Asked Questions
Does a stock split affect basis?
A stock split does not change your overall basis, but it does affect your basis per share. You'll need to recalculate your per-share basis after a split.
Sources
- https://www.nerdwallet.com/article/investing/what-are-stock-splits
- https://www.schwab.com/learn/story/what-happens-to-options-when-stocks-split
- https://www.fidelity.com/learning-center/investment-products/options/contract-adjustments
- https://bullishbears.com/what-happens-to-options-when-a-stock-splits/
- https://marketrebellion.com/news/trading-insights/stock-splits-what-options-traders-need-to-know/
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