A stock exchange is an organised marketplace with a specific job: it runs the systems and rules that let shares be bought and sold. People often use 'market' and 'exchange' almost interchangeably, but the exchange is the infrastructure behind the market.
What an exchange actually does
- Matches orders — pairs buy orders with sell orders to create trades.
- Publishes prices — shows the latest traded price and the best bids and offers.
- Lists companies — decides which companies may have their shares traded, under listing rules.
- Monitors trading — watches for unusual activity and reports concerns to the regulator.
An exchange also sets standards for the companies it lists: things like regular financial reporting and timely disclosure of important news. These standards are one reason investors are willing to trade on an exchange they have never visited.
'Listing' means a company's shares are admitted to trade on an exchange. A fictional example: Nimbus Technologies Ltd 'lists' on an exchange, and from then on its shares can change hands among investors.
| Exchange's role | What it means for an investor |
|---|---|
| Order matching | Your order can be filled quickly if someone takes the other side. |
| Price publication | You can see the current price and how actively a share trades. |
| Listing rules | Listed companies must follow disclosure and reporting standards. |
| Surveillance | Unusual trading is monitored and reported to the regulator. |
How a share reaches you
Click each step to see what that part of the chain actually does.
Company
A business that decides to raise money by selling shares to the public. Once its shares are admitted to trading, it is 'listed'.
Money moves in the opposite direction: from your broker to the seller, once the trade settles.
An exchange is a venue, not an adviser. It does not tell anyone what to buy or sell, and listing on an exchange is not a judgement that a company is a 'good' investment.