Stock Split
By WikiWealth Editorial Team|Last updated:
Key Takeaways
- A stock split increases the number of outstanding shares while proportionally reducing the share price
- Common split ratios include 2-for-1, 3-for-1, 4-for-1, and even 10-for-1 or 20-for-1
- A stock split does not change the company's total market value or any investor's total position value
- Reverse stock splits reduce share count and increase price per share, often viewed negatively
Definition
A stock split is a corporate action in which a company divides its existing shares into multiple new shares. In a 2-for-1 split, each share becomes two shares, and the price per share is halved. The total market capitalization and each investor's total investment value remain unchanged. Companies typically split their stock to make shares more affordable and accessible to a broader range of investors.
How It Works
In a stock split, the company increases its shares outstanding by a specified ratio while reducing the price per share proportionally. For a 4-for-1 split: if you own 100 shares at $400 each (total value $40,000), after the split you own 400 shares at $100 each (total value still $40,000). The company's market cap, P/E ratio, and total equity are unchanged. EPS, dividends per share, and other per-share metrics are adjusted proportionally. A reverse stock split does the opposite — a 1-for-10 reverse split converts 10 shares into 1 share at 10× the price. Reverse splits are often used by companies whose stock price has fallen below exchange minimum requirements.
Example
Apple (AAPL) executed a 4-for-1 stock split in August 2020. Before the split, shares traded around $500 each. After the split, the price adjusted to approximately $125 per share, and each shareholder received four shares for every one they owned. An investor holding 50 shares at $500 ($25,000 total value) received 200 shares at $125 ($25,000 total value). The split made Apple shares more accessible to smaller investors and resulted in its inclusion in the price-weighted Dow Jones Industrial Average.
Why It Matters
While stock splits are mathematically neutral (they don't change fundamental value), they can have practical effects. Lower share prices improve accessibility for retail investors, especially those who don't have access to fractional shares. Research shows that stocks tend to outperform modestly in the months following a split announcement, likely because splits signal management confidence and attract increased investor attention. However, this effect should not be a primary investment thesis.
Advantages
- Makes shares more affordable and accessible to a broader range of investors
- Can increase trading liquidity as more investors can participate at lower price points
- Often signals management confidence in continued growth and strong stock performance
- May enable inclusion in price-weighted indices like the Dow Jones
Limitations
- Does not create any real value — it's equivalent to exchanging a $20 bill for two $10 bills
- Reverse stock splits are often viewed negatively as they may indicate financial distress
- Can complicate historical price analysis if data is not properly adjusted
- The post-split price pop is not guaranteed and should not drive investment decisions
Frequently Asked Questions
Related Terms
Browse more definitions in the financial terms glossary.