What it is

The stock market is the network of regulated marketplaces where ownership in publicly listed companies is bought and sold. When you buy a share, you are buying a single unit of ownership in a real business. Owning shares can entitle you to a slice of the company's profits and, in some cases, a vote on major decisions.

Two terms are easy to confuse, so it helps to separate them early:

• An exchange is the regulated venue where trades actually take place - for example the New York Stock Exchange or Nasdaq. The exchange matches buyers with sellers and publishes prices.
• A broker is the intermediary you use to reach that exchange. You do not walk onto the exchange floor yourself; you send instructions to a broker, who routes your order to the market.

A quick way to remember it: the exchange is the marketplace, while the broker is your messenger into that marketplace.

How it works

Every listed company is identified by a short code called a ticker symbol - for instance, AAPL for Apple. The ticker is simply a shorthand label so that a trade, quote, or chart points to exactly one security with no ambiguity.

When many people want to buy and sell the same share, their offers form a continuous stream of prices. The exchange records each completed trade and broadcasts the latest price. That price reflects what buyers and sellers agreed on at that moment - not a fixed value set by the company.

• A share represents partial ownership of a company, not a loan to it.
• The exchange provides the rules, transparency, and matching that let strangers trade safely.
• The ticker is the unique address that ties every quote and order to one company.

How to read it

When you see a stock quote, you are really reading three things at once: which company (the ticker), what it last traded at (the price), and where that trade happened (the exchange). Understanding that a share is genuine ownership - rather than a lottery ticket - sets the right mindset for everything that follows in this hub.

Key takeaway: A share is a unit of ownership in a real company; the exchange is the regulated marketplace; the broker is how you reach it; and the ticker is the unique code that identifies the security.