What is a stock split?
Updated on August 24, 2026 · by Alex
A split is when a company divides each of its shares into several. In a 4-for-1 split, someone who held 10 shares at 400 ends up with 40 at 100. The total value is exactly the same.
The key point: nothing about value changes. It is cutting the same pizza into more slices. The company is not worth more, your investment is not worth more, and your ownership percentage does not change.
What does change is the price per share, and with it every historical per-share figure, including EPS. That is why charts are "split-adjusted": if they were not, a violent drop that never happened would show up on the day of the split.
Even though value does not change, perception usually does. A $3,000 stock feels psychologically out of reach for a lot of people; the same stock at 150 looks buyable. On top of that, splits historically made it easier to buy round lots — an effect that fractional shares have all but erased today.
And there is an indirect signal: companies tend to split after the stock has run up a lot, and rarely when things are going badly. The announcement is often read as a show of confidence from management.
Buying because "it is cheap now." It is not. It is exactly as expensive or as cheap as it was the day before, measured against what the company earns.
It is also worth knowing about the reverse split, which goes the other way: it merges several shares into one to push the price up. It is usually done by a company whose stock has fallen so far that it risks being delisted for trading too low. That one is almost always a sign of trouble.
