Stock market basics · updated October 21, 2026
What does a stock's liquidity mean
Liquidity shows how easily you can buy or sell a stock quickly without moving its price. A liquid stock has many buyers and sellers every day and a small gap between the buying price and the selling price.
How it works
You can see liquidity in three places: volume (how many shares trade per day), the gap between the best buying price and the best selling price (the spread), and how many orders sit in the order book at each price. Large US stocks trade millions of times a day. On smaller exchanges, such as Bucharest, a few large companies are liquid while many small ones see only a handful of trades a day.
Worked example
Stock A trades 2,000,000 shares a day, stock B trades 3,000.
If you want to sell 5,000 B shares, your order is bigger than a full day's volume: you will sell cheaper or over several days.
How to read liquidity
The thresholds are rough and depend on how much you invest: the more money you put in one stock, the more liquidity you need.
When liquidity can fool you
A wide spread: on illiquid stocks you lose money just by buying and selling right away. Liquidity vanishes in a panic: exactly when you want to sell, buyers step back.
Related terms
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Questions about liquidity
Why does liquidity matter for a small investor?
Because on an illiquid stock you pay a wide spread and may not find a buyer when you want to sell.
How do you check liquidity?
Look at the average daily volume, in money, and at the gap between the bid and ask prices in the order book.
These explanations are for information only. They are not a recommendation to buy or sell.
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