/ TERMS & FAQS

What are Stock Splits?

A stock split is a decision by the company’s board of directors to increase a company’s number of shares, causing a decrease in the stock price and making shares more affordable. A stock split does not change a company’s value or total market capitalization as dilution does not occur.

When stock splits occur, especially when large, well-known companies do them, they tend to gain a lot of media attention. But what is a stock split exactly? How does it impact investors? And why do companies choose to split stocks? In this post, we’ll answer all these questions and more.

Defining a Stock Split

Every publicly-traded company has a set number of outstanding shares. A stock split occurs when the company decides to increase this number from the existing outstanding shares.

This process begins with the company’s board of directors deciding on the stock split. The stock split is then announced to the public and set for a specific day. To qualify for the stock split, you must already own company stock by a specific date. Once that day of the split arrives, a single share of the stock is split into pieces.

Splitting a Stock

The company may split one share into as many shares as it likes, but the most common stock splits are 2-for-1 splits and 3-for-1 splits. In a 2-for-1 split, one share is split into two shares, and in a 3-for-1 split, one share is split into three shares. For example, if a company had 5 million outstanding shares and decided to do a 2-for-1 stock split, the company would have 10 million outstanding shares after the split. As an investor, a stock split means you’ll own more shares.

For example, if you owned 100 shares of a company and a 3-for-1 stock split occurs, you’ll end up with 300 shares.

A stock split also impacts the share price. If one share is worth $200 before a 2-for-1 stock split, after the split, one share would be worth $100.

While the number of shares and the price of each share changes, a stock split does not impact the company’s market capitalization. This means a stock split has no impact on the value of the company or of your investment.

A helpful way to think about a stock split is to compare it to slicing a pie. If you have one pie, no matter how many pieces you cut it into, you don’t have any more or less pie. A stock split is like cutting a pie into eight pieces, then deciding you would like to have more slices, so you cut each piece in half to give you sixteen pieces.

Stock "Pie" Split

The number of slices (shares) changes, and the size of each piece (the price per share) changes, but the size of the pie (the market capitalization) stays the same.

How Stock Splits Impact Companies

If stock splits have no impact on the company’s value, then why do companies do them?

There are a few reasons why.

One reason is that a lower share price makes stocks more affordable. An individual investor with only a few thousand, or even a few hundred dollars to invest, may not want to purchase a single share of a company for $150 but may wish to for $75. Modern trading has made it questionable how much of an impact this has, but we’ll discuss that more later in this post.

Since more investors can theoretically afford the stock at a lower price, this means there’s a broader potential market for that stock, which increases liquidity. Increased liquidity is beneficial to a company because it typically leads to a smaller bid-ask spread (the difference between the price someone is willing to sell a security for and the price someone is willing to purchase that security at). A smaller bid-ask spread enables employees and the company to raise capital from their held shares more easily.

Companies may choose to split their stock because it may lead to an increase in demand. According to a study by Nasdaq, stock splits of large-cap stocks from 2012 to 2018 lead to a 2.5% increase in share price after the announcement and a 5% increase after one year. What’s so interesting about this is that, as previously discussed, a stock split has no actual impact on a company’s value. Still, it is often perceived positively by investors.

One reason investors tend to view a company favorably when it is splitting its stock is that a stock split implies that share price is rising. In theory, stock splits occur when the share price increases enough that it limits the stock’s accessibility for many investors. But a stock split does not require outperformance. The value of a share may simply have risen at the same level as the rest of the market.

How Stock Splits Impact Investors

As we saw, in theory, stock splits benefit investors by making the stock accessible to a broader investing audience. Furthermore, increased liquidity and smaller bid-ask spreads, which, as we saw benefit companies, also benefit investors. It does this by making rebalancing a portfolio easier since lower share prices means it’s easier to find buyers for shares.

But it’s not all good news for investors, especially less experienced investors. While it’s true that a correlation exists between rising share prices and a stock split, a stock split has no real impact on the company’s value. The future earnings of a company is simply divided among more shares – there is still the same amount of pie no matter how many slices you cut it into. But less experienced investors often see the correlation between share price and stock splits and mistakenly assume that stock splits impact the company’s value.

Why does it matter if an investor confuses correlation and causation? Isn’t the result ultimately the same?

The problem is that this mistaken assumption often impacts the behavior of investors. The belief that a stock is more valuable may cause investors to overpay for that stock. The more this occurs, the more investors may associate stock splits with rises in share price, which only exacerbates the situation. And while share price often does increase over the first year, often the share price shoots up immediately after the stock split, only to drop back down and end up much closer to its original price.

Stock Splits and Short Positions

We’ve seen how stock splits may impact regular investors, but let’s also take a moment to see how stock splits impact short sellers. As discussed, a stock split has no material impact on a company’s value. This means a stock split does not have any material effect on short-sellers, but it does create some changes.

Shorting a stock is often discussed as betting against a stock, by assuming the price will drop to a certain amount. When considered this way, a stock split becomes far more confusing because the stock price was shorted at a price often above the split price. But this interpretation of short selling is only partly correct. When you short a stock, you are essentially selling it before you buy it. You must buy the borrowed shares back at some point, and if you do this when the price is lower than when you “sold” it, you’ve made a profit.

When a stock split occurs, the number of shares you have outstanding changes, and the price per share changes, but the value of shares (stock price x number of shares) remains the same.

Let’s say you short 100 shares, and the current share price is $50. This gives you a position valued at $5,000. If a 2-for-1 stock split occurs, you now have a short position of 200 shares with a share price of $25, and the value of your position is still $5,000.

Why Some Companies Choose Not to Split Stocks

Many companies choose to split their stock, and there are potential benefits to both the company and the investors, but plenty of companies also choose not to split stocks, even when prices climb incredibly high.

One of the most well-known examples of a company that’s chosen not to split its stock is Warren Buffett’s company, Berkshire Hathaway. A single Class A share of Berkshire Hathaway is currently valued at over $300,000. And if the Oracle of Omaha chooses not to, there must be some reasons to choose not to split stocks.

One explanation is that some people believe a high share price comes with more prestige. For example, a company with a share price of $2,000 may be viewed more favorably than a company with a share price of $100, even if both companies’ market capitalization is the same. The opposite also applies. Smaller companies may be concerned about a stock split driving prices lower, since stocks below a specific price (usually around $10) may be perceived less favorably.

But the biggest reason some companies may choose not to split their stock may not be about prestige. Since a stock split has no real impact on the company’s value, it may be as simple as not seeing a good reason for it.

Reverse Stock Splits

We’ve looked at regular stock splits and their implications for both companies and investors, but there’s also another kind of stock split you may have heard of called a reverse stock split. A reverse split is what it sounds like - the opposite of a regular stock split. Let’s look at a quick example to see what this means.

If you have 100 shares of a company’s stock and a regular 2-for-1 stock split occurs, you’ll have twice as many shares - 200. When a reverse stock split happens, you’ll have fewer shares. In a reverse stock split of 1-for-2, your 100 shares would become 50 shares. Like a regular stock split, a reverse stock split impacts the number of shares, and it affects the price of each share, but it does not impact market capitalization.

Companies often undergo a reverse stock split to avoid becoming delisted on an exchange. When a company is delisted from an exchange, it means that the company’s stock would no longer be traded on that exchange. Becoming delisted often has significant negative repercussions for a company. A reverse stock split allows companies to potentially avoid this fate by increasing their per-share price.

If a company has recently had a reverse stock split, this is often not a good sign. Splits don’t impact the company’s value, but a price that’s dropped low enough to potentially have the company delisted is a red flag.

Reverse Stock Split Warning

The company may turn its performance around, but if a company has recently undergone a reverse stock split, you may want to think twice before investing. At the very least, you should review the company’s plan for improving performance to see if the plan is sound.

Is Stock Splitting Still Necessary?

One of the most touted benefits of stock splits is, as we discussed previously, that they make stocks more accessible to investors. But trading today has changed in ways that make stock splitting seem less necessary.

First of all, it used to be that buying anything less than 100 shares, which is referred to as a round lot, was not ideal, since execution trades on anything less than a round lot cost more, but that’s no longer the case. Even if you were willing to pay more in execution costs, individual investors still needed to afford one share, but this is also changing.

Investors now have many options for purchasing fractional shares of a company, which are only fractions of one share. Apps such as Betterment and Robinhood allow investors to buy fractional shares. Mutual funds, which consist of a basket of many different securities, also allow investors to purchase fractional shares. Many mutual funds allow investors to have a portfolio diversified across hundreds of different companies for the cost of one share of many of those companies.

The sweet spot for one share used to be between $40 and $80. Once stocks exceeded this limit, they would often consider a stock split to back down the share price. But why does this price make a difference if purchasing fractional shares has become so much easier? Arguably, the necessity of stock splitting has dramatically diminished now that investors have these options, but it continues.

One potential reason is purely psychological. Even if investors have the option of purchasing fractional shares, they may still consider companies with certain share prices as more desirable. And as we’ve seen, a stock split does seem to increase volatility and drive the price up.

Tesla and Apple’s August 2020 Stock Split

You may have heard about stock splits more than usual lately, and if so, it seems highly likely that what you’ve listened to relates to Tesla and Apple’s August 2020 stock splits.

Tesla & Apple stock splits

Apple announced its 4-for-1 stock split at its third-quarter earnings call on July 30th. Apple stock began trading at its new, split share price beginning August 31st.

Tesla announced a 5-for-1 stock split, which also began trading at its revised price beginning August 31st.

Both companies saw their share prices jump after the news. In the weeks after the announcement, Apple shares increased by 30%, and Tesla’s increased by 61%. Furthering this growth was the performance of both companies’ on the day the stock split took place. On August 31st, Tesla’s stock closed up 12.5%. Apple also saw a noticeable boost to its share price on August 31st, with a 3.4% increase.

This is a massive increase for an event that had zero impact on the fundamentals of either company. And a few days after the split took place, investors seemed to remember this finally. On September 2nd, the sudden rise of only two days before began correcting itself. On September 3rd, three days after the stock splits took effect, Tesla stock began dropping dramatically. By midday, it had already seen a 9% fall in price.

Only time will tell the ultimate impact the split has on both Apple and Tesla.

These two stock splits garnered such significant media attention, partly due to the dramatic rises in the price they lead to, but also because Apple’s stock impacted the makeup of the Dow Jones Industrial Average (DJIA). The DJIA is an index of thirty of the largest companies in the United States weighted by stock price. Apple’s stock split diminishes the company’s weighted average in the index from about 12% to about 3%. To make up for this change, the DJIA removed ExxonMobil, Pfizer, and Raytheon Technologies and replaced them with Salesforce.com, Amgen, and Honeywell International.

The Takeaway

A stock split is a cosmetic action that should not impact the market capitalization of a company. If you think a company is a good value regardless of the stock split, there’s nothing wrong with investing in it, but a stock split is not a good reason to purchase shares – unless, of course, you’re a sophisticated quantitative trader exploiting the abnormal returns following a stock split announcement anomaly.

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Leo Smigel

Based in Pittsburgh, Analyzing Alpha is a blog by Leo Smigel exploring what works in the markets.