Stock Splits and Reverse Splits
A split changes how a company's ownership is sliced, not how large the company is. This lesson removes a very common beginner illusion of a bargain.
Why this matters for beginners
A share that suddenly costs a quarter of yesterday's price looks cheap. After a four for one split, it is not cheaper at all, and confusing the two leads to poor decisions.
Main explanation
In a stock split, each existing share becomes several. In a four for one split, one share at 400 becomes four shares at 100. Your total value is unchanged.
Because the price per share falls but the share count rises, market capitalisation, profits and ownership percentage all stay the same. Nothing about the business changed.
A reverse split works in the opposite direction: ten shares at 0.40 become one share at 4.00. It is often used to lift a very low price back above exchange or index requirements.
A reverse split can be a warning sign because it often follows a long price decline, but the split itself neither improves nor damages the underlying business.
Example using a real company
A company with 100 million shares at 200 does a two for one split, ending with 200 million shares at 100. Market capitalisation stays at 20 billion.
- →Four for one split: 10 shares at 400 become 40 shares at 100.
- →One for ten reverse split: 500 shares at 0.30 become 50 shares at 3.00.
Common beginner mistakes
- ✕Thinking a split makes a share cheaper in value terms.
- ✕Assuming a split is a signal that management expects growth.
- ✕Reading a reverse split as an automatic reason to sell without checking why it happened.
Key terms
- Stock split
- An increase in share count with a proportional fall in price per share.
- Reverse split
- A reduction in share count with a proportional rise in price per share.
- Market capitalisation
- Share price multiplied by shares outstanding.
Key takeaways
- 01Splits change the slicing, not the size of the business.
- 02Your ownership percentage is unaffected by a split.
- 03A reverse split often follows weakness, so look at the reason behind it.
Check yourself
- 01A stock split increases the total value of your holding.
- 02A reverse split reduces the number of shares outstanding.
- 03A split changes the percentage of the company you own.
Try the concept on a real company
Look at a company that has split its shares before and check whether its market capitalisation, not its share price, tells the size story.
Educational examples only. Not buy or sell recommendations.