What is Stock split?
Split
In short
Dividing shares: in a 4-for-1 split each share becomes four and the price falls by four. Total value is unchanged.
Also known as: reverse split
A stock split divides existing shares into more, cheaper shares. In a 4-for-1 split each share becomes four and the price falls by four. Neither the investor's total value nor the company's market cap changes — the pie is simply cut into more slices.
Formula
- New share count = old count × ratio
- New price = old price ÷ ratio
- Dividends per share, EPS and price targets are divided by the same ratio.
Reverse split
A reverse split combines shares: in a 1-for-10 reverse split every 10 shares become 1 and the price rises tenfold. Companies whose price has fallen a lot often do this, for example to meet an exchange's minimum price requirement. A reverse split is not bad in itself, but it often signals a company in difficulty.
A regular split usually happens after a big run-up, making the stock look "cheaper" to small investors. Fundamentally nothing changes. Charts adjust historical prices for splits; otherwise the split day would show a fake "crash".
Example
Example: you own 10 shares at $800 — $8,000 in total.
- After a 4-for-1 split: 10 × 4 = 40 shares at $800 ÷ 4 = $200. Total: 40 × $200 = $8,000.
- If the company paid a $2 quarterly dividend before, it now pays $0.50 per share: 40 × $0.50 = $20 — the same as 10 × $2 = $20.
Reverse split: 500 shares at $0.80 = $400. After a 1-for-10 reverse split, 50 shares at $8 = still $400.
Mistakes and tips
A split does not make a stock cheaper — don't compare the post-split price with the old one and call it a discount.
If a reverse split is announced, read why: it often follows a long decline, especially in penny stocks.
Adjust the entry price and share count in your trading journal by the split ratio, or your percentage results will be wrong.
Frequently asked questions
- Does a stock go up after a split?
- A split doesn't change value, so it guarantees nothing. Interest can rise after the announcement, but long-term price is driven by the company's results.
- Do I lose money in a stock split?
- No. You get more shares, the price falls proportionally, and your total value stays the same.
- Is a reverse split good or bad?
- Mathematically neutral, but it is often used by companies whose price has collapsed. Treat it as a caution flag and check the reason.
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