How the Stock Market Works

This entry on the stock market for beginners is written for readers who may have bought crypto but never a share. The two can look alike on a trading screen, a ticker, a chart, a buy button, yet they rest on very different foundations. Understanding those foundations explains why share prices behave as they do and why the rules around them are so much stricter.

What you own when you own a share

A company that wants to raise money can divide its ownership into shares and sell some of them to the public. Buy one, and you own a small fraction of that business. That brings concrete rights, set out in company law:

• a claim on the company's profits, which may be paid out as dividends;
• usually a vote at shareholder meetings, for example on who sits on the board;
• a share of what is left if the company is sold or wound up, after lenders are paid.

Because a share is tied to a real business with accounts, revenue and profit, analysts can argue about what it is worth by looking at those numbers. That anchor does not stop prices swinging, but it gives them something to swing around. Fundamental analysis is the discipline built on that idea.

How a stock exchange works

Once issued, shares trade between investors on an exchange such as the New York Stock Exchange, Nasdaq, the London Stock Exchange, Xetra in Frankfurt or the Tokyo Stock Exchange. The exchange runs an order book in which buy and sell orders meet, publishes every trade, and enforces rules on the listed companies, which must report results regularly and disclose market-moving news promptly.

Most sessions start and end with an auction, a short period in which orders are collected and then matched at a single price. The closing auction produces the official closing price used by funds and indices.

Stock market stocks are grouped in several ways that you will see constantly: by size (large-cap, mid-cap, small-cap), by sector (banks, energy, technology and so on), and by whether they pay regular dividends. None of those labels says whether a share is cheap or good value; they simply help describe what kind of company it is.

The stock market for beginners: brokers, orders and settlement

Private investors do not trade directly on an exchange. They use a broker or investment platform that is a member of the exchange or deals through one. In most regulated markets the broker holds your shares in a nominee account on your behalf, legally ring-fenced from its own assets. If the broker fails, those shares should be returned to clients, and some countries add compensation for shortfalls up to a limit. This is one of the biggest practical differences from keeping coins on a crypto exchange.

Order types you will meet first

• Market order: buy or sell now at the best available price. Fast, but the price is not guaranteed.
• Limit order: buy or sell only at your chosen price or better. You control price but may not be filled.
• Stop order: becomes a market order once a trigger price is reached, often used to limit losses.

Settlement

The trade you see on screen is agreed instantly, but legal transfer of the shares and cash follows later. In the US that happens one business day after the trade, known as T+1, a cycle in force since May 2024. Until settlement, the cash from a sale may not be available to withdraw.

Dividends and total return

Your return from a share has two parts: the change in its price and any dividends paid. The combination is called total return. An illustrative example:

Dividends are not guaranteed. Boards can cut or cancel them, and a high yield is sometimes a sign the market expects exactly that. Many brokers let you reinvest dividends automatically, which compounds the holding over time.

Indices: a market in one number

An index tracks a basket of shares so you can see how a market is moving without checking hundreds of prices. The rules for choosing and weighting members matter:

Index funds and exchange-traded funds that follow these benchmarks are how many people hold shares without choosing individual companies.

Trading hours around the world

Unlike crypto, each exchange keeps weekday hours in its own time zone and closes for public holidays.

• New York (NYSE, Nasdaq): 09:30 to 16:00
• London: 08:00 to 16:30
• Frankfurt (Xetra): 09:00 to 17:30
• Tokyo: 09:00 to 11:30 and 12:30 to 15:30
• Hong Kong: 09:30 to 12:00 and 13:00 to 16:00
• Sydney (ASX): 10:00 to 16:00
• India (NSE and BSE): 09:15 to 15:30

Some brokers offer pre-market and after-hours trading in US shares, but volume is thin and spreads wider. The live board on the home page shows which markets are open as you read.

How share prices are set day to day

A share price at any moment is simply the last price at which a buyer and a seller agreed to trade. Behind it sit expectations. When a company reports results, investors compare them with what analysts had forecast, so a profit that beats last year can still send the shares lower if the market had hoped for more. Guidance about the coming year often moves the price more than the results themselves.

Wider forces act on every company at once. Rising interest rates make future profits worth less in today's money and make safer assets such as government bonds more attractive, which tends to weigh on shares in general, particularly companies whose profits lie far in the future. Slowdowns hit some sectors harder than others: a supermarket's sales usually hold up better in a downturn than a carmaker's.

Then there are events specific to one firm: a new product, a lawsuit, a takeover bid, a change of chief executive. A takeover offer can lift a share sharply in a day, and a profit warning can cut it just as fast. That is why holding a single company carries more risk than holding a fund spread across many.

Primary and secondary markets

When a company first sells shares to the public, in an initial public offering, the money goes to the company. Every trade after that happens between investors, and the company receives nothing from it. That second arena, the secondary market, is what most people mean when they talk about the stock market.

Crypto habits that do not transfer well

• Expecting 24/7 exits. If news breaks on a Saturday, you cannot sell a share until Monday's open, and it may open far from Friday's close.
• Treating every dip as a bargain. A share price can fall and stay down if the business itself has deteriorated. Checking results and debts matters more than the chart.
• Heavy leverage. Retail CFD leverage on individual shares is capped at 5:1 in the UK and EU for good reason: single companies can drop sharply on one announcement.
• Ignoring tax wrappers. Many countries offer tax-advantaged accounts for shares. In the UK, for instance, the ISA allowance is £20,000 for the 2026/27 tax year.

Sources

• US Securities and Exchange Commission, T+1 settlement cycle
• S&P Dow Jones Indices, index methodology documents
• FTSE Russell, FTSE 100 ground rules
• HM Revenue & Customs, ISA allowances