A stock split divides each existing share into several new ones at a proportionally lower price. In a 4-for-1 split, one $400 share becomes four $100 shares. Nothing about the company or the total value of a holding changes. For a stock CFD, the provider adjusts the position so its value is unchanged, usually by multiplying the position size by the split ratio, and may adjust or cancel pending orders.
Key takeaways
- A split changes the number of shares and the price per share, not the value of the company or of your position.
- A reverse split does the opposite, combining shares into fewer, higher-priced ones.
- On a CFD the provider adjusts the position size, the opening price, or both, so the position’s value is unchanged.
- Pending orders and stop levels set at pre-split prices may be adjusted or cancelled.
- Charts are usually back-adjusted, so historical prices look lower than they were at the time.
| Forward split | More shares, lower price, same value |
|---|---|
| Reverse split | Fewer shares, higher price, same value |
| Effect on a CFD position | Size and price adjusted by the ratio; value unchanged |
| Effect on pending orders | Adjusted by the split ratio or cancelled before the split |
| Why companies split | Lower share price, index weighting (for the Dow), employee share plans |
What is a stock split?
The board decides the ratio and a date. On the effective date the share begins trading at the new price, and each holder has more shares. Market value is unchanged: four $100 shares are worth the same as one $400 share. Any move after that date is the market’s reaction, not the split itself.
What happens to a stock CFD in a split?
| Measure | Before | After |
|---|---|---|
| Price per share | $400 | $100 |
| Position size | 10 shares | 40 shares |
| Position value | $4,000 | $4,000 |
| Opening price | $380 | $95 |
| Unrealised profit | $200 | $200 |
| Stop-loss set at $360 | $360 | $90, if adjusted |
The adjustment is made before the market opens on the effective date. Check the position in the MT5 Trade tab afterwards: the volume and opening price should both reflect the ratio, and the profit or loss should be unchanged. If a provider cannot represent a fractional result, it may round the position and settle the remainder in cash.
Pending orders and stops
An order to buy at $390 makes no sense once the share trades at $100. Providers either divide order prices by the ratio or cancel pending orders before the split. Review stop-loss and take-profit levels after every split; see how to set a stop-loss and take-profit on MT5 and how to place a pending order on MT5.
Reverse splits
A 1-for-10 reverse split turns ten $2 shares into one $20 share. Companies often do this to keep their price above an exchange’s minimum listing requirement, so a reverse split can be a sign of difficulty. On a CFD, the position size is divided by the ratio and the price multiplied by it; small positions may be rounded.
| Feature | Forward split (e.g. 4-for-1) | Reverse split (e.g. 1-for-10) |
|---|---|---|
| Share count | Multiplied | Divided |
| Share price | Divided | Multiplied |
| Value of holding | Unchanged | Unchanged |
| Common reason | Share price has become very high | Share price has become very low |
| Typical market reading | Often seen as confident | Often seen as a warning sign |
Recent large splits
| Company | Ratio | Effective |
|---|---|---|
| Apple | 4-for-1 | August 2020 |
| Tesla | 5-for-1, then 3-for-1 | August 2020, August 2022 |
| Amazon | 20-for-1 | June 2022 |
| Alphabet | 20-for-1 | July 2022 |
| Nvidia | 4-for-1, then 10-for-1 | July 2021, June 2024 |
Splits matter to price-weighted indices. In the Dow a split reduces a company’s weight, which is why companies with very high share prices have tended to join only after splitting; see how the Dow Jones is calculated. Charts are back-adjusted after a split, so a historical high of $1,000 may appear as $250.
What it costs to trade stock splits as a CFD
Splits are handled as corporate-action adjustments on stock CFDs. See stock CFDs vs buying shares.
| Cost | When it applies | Note for stock splits |
|---|---|---|
| Spread | Every trade | Unchanged by the split in percentage terms |
| Overnight financing | Each night | Unchanged, because the position value is unchanged |
| Commission | Per trade | If charged per share, the count changes after a split. |
| Rounding | When the adjusted size is not a whole contract | Remainder may be settled in cash. |
Key risks
Order confusion. Pre-split order and stop levels can be wrong after the split if not adjusted.
Chart confusion. Back-adjusted charts show prices that never traded.
Reverse-split signals. A reverse split often accompanies financial difficulty.
Leverage. See how leverage increases trading risk.
Risk warning. Trading CFDs carries a high level of risk since leverage can work both to your advantage and disadvantage. As a result, the products offered on this website may not be suitable for all investors because of the risk of losing all of your invested capital. You should never invest money that you cannot afford to lose, and never trade with borrowed money.
Frequently asked questions
What happens to a CFD when the stock splits?
The provider adjusts the position so its value does not change. In a 4-for-1 split, a position of 10 shares at $400 typically becomes 40 shares at $100, and the opening price is divided by four. Pending orders may be adjusted or cancelled.
Does a stock split change the value of my position?
No. A split changes the number of shares and the price per share by the same ratio, so the total value is unchanged at the moment of the split. Any change afterwards comes from normal market movement.
What is a reverse stock split?
A reverse split combines several shares into one at a proportionally higher price, for example ten $2 shares into one $20 share. It is often used to keep a share above an exchange’s minimum price and is sometimes a sign of financial difficulty.
Why do companies split their shares?
To lower the price per share, which can make shares easier to buy in whole units and helps employee share plans. For price-weighted indices such as the Dow, a split can also make a company eligible for inclusion without giving it an outsized weight.
What happens to my stop-loss after a split?
It depends on the provider. Some divide the order price by the split ratio; others cancel pending orders before the split. Check every stop-loss and pending order after a split has taken effect.
Related reading
Record your position before a split
Ahead of the effective date, note each stock CFD position's volume, opening price and stop levels so the adjustment can be checked figure by figure; splits are sometimes announced alongside quarterly results, which stock CFDs and earnings season covers.
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