How Does the Stock Market Work?

The stock market is a network of exchanges where people buy and sell small ownership shares of public companies. Prices move as buyers and sellers agree on what a share is worth, moment to moment, based on supply, demand, and expectations about the company. This is educational, not financial or investment advice.

What a share actually is

A share is a small piece of ownership in a company. If a company has issued a million shares and you own one, you own a millionth of it — including a claim on its share of future profits. Companies issue shares to raise money; people buy them to own a piece of the business.

Exchanges, brokers, and how a trade happens

• Exchanges (such as the NYSE or Nasdaq) are the marketplaces where shares trade.
• You do not trade on them directly — you use a broker (an app or firm) that places your order on the exchange for you.
• Every trade needs a buyer and a seller who agree on a price.

Why prices move

A price is simply the most recent point where a buyer and a seller agreed. It moves with supply and demand, which shift on company results, news, and expectations about the future. No single person sets it; it is the running result of everyone's orders meeting in the market's liquidity.

Bid, ask, and the spread

At any moment the bid is the highest price buyers will pay and the ask is the lowest price sellers will accept. The gap between them is the spread. Which order type you use to cross that gap matters — a market order fills immediately at the best available price, while a limit order only fills at a price you set or better.

Primary vs secondary market

When a company first sells shares to raise money (an IPO), that is the primary market. After that, investors trade those shares among themselves on the secondary market — which is the day-to-day trading most people mean by "the stock market."

How people aim to make money

Two main ways: the share price rises and they sell for more than they paid, or the company pays a dividend (a share of profits). Neither is guaranteed — prices fall too, and buying shares carries a real risk of loss. Whether you hold for years or trade actively is the difference between investing and trading.

Takeaway

The stock market is where people buy and sell small ownership stakes in companies through brokers and exchanges, and prices are just the running result of buyers and sellers agreeing. Understanding shares, the bid-ask spread, and why prices move is the foundation everything else builds on.

Educational only — not financial or investment advice; investing and trading carry a real risk of loss.