It's a common instinct to look at two stocks -- one at $20 a share, one at $500 a share -- and assume the $500 one belongs to the bigger, more valuable company. That assumption is wrong more often than not, and mixing up share price with company value is one of the easiest ways to misread the market.
What share price actually measures
A share price is just the total value investors have assigned to the company, divided by however many shares that company has decided to issue. It tells you what one slice costs. It tells you almost nothing about how many slices there are, or how big the whole pie is.
What market cap measures instead
Market capitalization -- market cap -- is share price multiplied by total shares outstanding. That's the actual dollar value the market is putting on the entire company. A company with a $50 share price and 10 billion shares outstanding has a market cap of $500 billion. A company with a $500 share price and 100 million shares outstanding has a market cap of $50 billion. The first one is ten times bigger, despite having the cheaper-looking share price.
Why the same company can look different after a split
Stock splits make this especially confusing. When a company does a 4-for-1 split, every shareholder ends up with four times as many shares, each worth roughly a quarter of the pre-split price. Nothing about the company changed -- not its revenue, not its assets, not its market cap. All that changed is how the same value is divided into shares. A split can make a stock look "cheaper" and more accessible without the company being worth a single dollar less or more.
Why this trips people up
It's tempting to treat share price as a proxy for quality or scale, because it's the number that's plastered everywhere -- tickers, headlines, apps. But two companies can have wildly different share prices and nearly identical market caps, or identical share prices and market caps that differ by orders of magnitude, purely because of how many shares each one has chosen to issue. Comparing companies on share price alone is comparing numbers that aren't measuring the same thing.
What to actually compare
If you're trying to gauge how big a company is relative to another, market cap is the number to reach for, not share price. Share price is still useful for its own reasons -- it tells you what a single share will cost you to buy, and it matters for things like options contracts sized in per-share terms. It just isn't a stand-in for company size.
Check a live price
If you want to see where a stock's price actually stands right now -- including its day range and 52-week range -- the Stock Price Tracker pulls live quotes for any ticker with no account needed.