Every so often, investors wake up to discover that a company they own has announced a stock split. Headlines may proclaim that a share worth £1,000 yesterday is now worth £100 today, leading some people to wonder whether they have suddenly lost 90% of their investment

Fortunately, the answer is no

Stock splits are one of the most misunderstood events in the investing world. They can generate excitement, attract media attention and sometimes even boost a company’s share price, yet they do not change the underlying value of the business. Understanding what they are – and what they are not – can help investors make better decisions

What is a stock split?

A stock split occurs when a company increases the number of shares in circulation while proportionally reducing the price of each share

Imagine you own one share in a company worth £100. If that company announces a 2-for-1 stock split, you will receive an additional share. You now own two shares, each worth £50

Before the split:

• 1 share × £100 = £100

After the split:

• 2 shares × £50 = £100

The total value of your holding remains exactly the same

The most common stock splits are:

• 2-for-1: One share becomes two
• 3-for-1: One share becomes three
• 5-for-1: One share becomes five
• 10-for-1: One share becomes ten

A company can choose any ratio it wishes, although the examples above are the most frequently used

Why do companies split their shares?

The primary reason is psychological rather than financial

As successful companies grow, their share prices can rise dramatically. A stock trading at £1,000 or £2,000 per share may appear expensive to smaller investors, even though the valuation of the business may be perfectly reasonable

By splitting the stock, management reduces the headline price and makes the shares appear more accessible

For example, if a share trading at £1,500 undergoes a 10-for-1 split, the price falls to approximately £150 while investors receive ten times as many shares

Although the economic value is unchanged, many investors find a £150 share easier to buy than a £1,500 one

Companies also hope that lower-priced shares may increase trading activity and improve market liquidity

Does a stock split make investors richer?

Not directly

A stock split is often compared to exchanging a £20 note for two £10 notes. You have more pieces of paper, but you’re no wealthier than before

The company’s profits, assets, cash flow and future prospects remain unchanged

However, stock splits can sometimes have an indirect positive effect. Because they often occur after a period of strong business performance, investors may view them as a signal of management confidence

A company rarely splits its stock because things are going badly

Historically, shares have sometimes risen following split announcements, although this is not guaranteed and should not be relied upon as an investment strategy

Famous stock splits

Some of the world’s best-known companies have used stock splits.

Apple has split its stock several times during its history, including a 4-for-1 split in 2020

Nvidia carried out a 10-for-1 split in 2024 after a remarkable rise in its share price driven by demand for artificial intelligence technology

Amazon implemented a 20-for-1 split in 2022, while Alphabet (Google’s parent company) implemented a similar move that year

In each case, the split didn’t alter the company’s value. It merely changed the number of shares and the price of each share

What is a reverse stock split?

The opposite process is known as a reverse stock split

Instead of increasing the number of shares, a company reduces them

For example, in a 1-for-10 reverse split, an investor holding 100 shares would end up with 10 shares, but each share would be worth 10 times as much

Reverse splits are often used by struggling companies whose share prices have fallen very low. Management may wish to increase the price to meet stock exchange listing requirements or improve the company’s image

Unlike ordinary stock splits, reverse splits are sometimes viewed with caution by investors

Do stock splits matter today?

Some analysts argue that stock splits matter less than they once did

In the past, investors generally had to buy whole shares. A lower share price therefore made a meaningful difference

Today, many investment platforms offer fractional shares, allowing investors to buy part of a share. Someone can invest £50 in a £1,000 stock if their broker permits fractional ownership

Nevertheless, stock splits continue to attract attention because they make shares appear more affordable and can increase interest among retail investors

In summary

A stock split changes the number of shares you own, but not the value of your investment

Think of it as slicing a pizza into more pieces. You have more slices, but you do not have more pizza

While stock splits can improve liquidity, attract new investors and generate positive publicity, they do not make a company fundamentally more valuable. Investors should therefore focus less on the split itself and more on the factors that truly drive long-term returns: profits, growth, competitive advantages and management quality

In investing, the size of the slice matters far less than the size of the pizza

The Corporate Stock Split Trick
Why companies do it, and why investors often misunderstand it.