What is the stock market?

In simple terms

The stock market is the system through which people buy and sell small pieces of ownership in companies. Each piece is called a share (or a stock). If a company is divided into one crore shares and you own one hundred of them, you own a tiny part of that business.

The "market" is not one building. It is a network of stock exchanges, brokers, banks and record-keepers, connected by computers, that lets millions of people trade shares safely with strangers. In India, most of this trading happens on two stock exchanges, the National Stock Exchange (NSE) and BSE (originally the Bombay Stock Exchange), under rules set and enforced by the Securities and Exchange Board of India (SEBI).

The two jobs the market does

The stock market exists because it solves two problems at once.

It helps companies raise money. A growing company might need ₹500 crore to build a factory. Few people have that much to lend. But lakhs of people together might each put in a few thousand rupees in return for a share of the company. Selling shares to the public lets the company raise large sums from many small savers.

It lets savers get their money back. If you buy shares in a company, you probably do not want to wait decades to see your money again. The stock market gives you a place to sell your shares to another investor whenever the market is open. Because buying is easier when selling is possible, people are more willing to invest in the first place.

These two jobs happen in two connected parts of the market. The part where companies sell new shares is called the primary market. The part where investors trade existing shares with each other, which is most of what you see on news channels, is the secondary market. You will meet both again in Primary and secondary markets.

Who takes part

• Companies sell shares to raise money, and must then publish their results and follow disclosure rules.
• Investors and traders buy and sell shares. They range from students investing ₹500 a month to large pension funds.
• Stock exchanges such as NSE and BSE run the electronic marketplace that matches buy and sell orders.
• Brokers are the firms whose apps and websites you use to send orders to the exchange. They must be registered with SEBI.
• Depositories keep the official electronic record of who owns which shares, in accounts called demat accounts.
• SEBI, the regulator, writes the rules, registers market intermediaries and acts against fraud and manipulation.

Why share prices move

A share's price is simply the price at which the last buyer and seller agreed to trade. If more people want to buy a company's shares than want to sell them at the current price, buyers must offer more and the price rises. If more people want to sell, the price falls.

Why would people suddenly want to buy or sell? Usually because their expectations about the company's future have changed. Good quarterly results, a new product, a lawsuit, a change in interest rates, or simply a change in mood can all shift those expectations.

Why it matters

Understanding what the stock market actually is protects you from two opposite mistakes.

The first is treating it as a casino, where prices move for no reason and the only skill is luck or a "hot tip". In fact, behind every share is a real business with customers, costs, profits and debts. Over long periods, share prices tend to follow how well those businesses do, even though they swing around a great deal in the short term.

The second mistake is treating it as a savings account, where money only goes up. Shares carry no guarantee. Companies can shrink, make losses, or fail altogether, and their shares can fall a long way or become worthless.

People who understand that shares are ownership of real, uncertain businesses are much harder to mislead with promises of easy money.

Limitations

This lesson describes the stock market in its simplest form. Real markets add many details that later lessons cover, such as different kinds of orders, settlement of trades, market indices, and products like mutual funds and derivatives that are built on top of shares.

It also describes how the market is meant to work. In practice, prices can be pushed around by rumours, panic or deliberate manipulation, especially for small companies whose shares trade rarely. A share price is the market's current opinion, not a measurement of what a business is truly worth.

Common mistakes

• "The stock market is gambling." Short-term trading on tips can resemble gambling, but owning shares means owning part of a business that earns real profits. The two are very different activities.
• "When I buy a share, my money goes to the company." Usually it does not. In the secondary market your money goes to the investor who sold you the share.
• "A falling price means the company is losing money." Not necessarily. Prices can fall because expectations dropped, because the whole market fell, or because investors needed cash, even when the business is doing well.
• "Big companies' shares are safe." Size reduces some risks, but no share is risk-free. Large, famous companies have also fallen sharply and failed.

Try it yourself

Think of three companies whose products you used this week, for example a soap, a mobile network, a bank or a two-wheeler.

1. For each one, write down whether you think it is a listed company (one whose shares trade on a stock exchange) or not.
2. Then write one sentence on how that company makes money.
3. Check your guesses later using the company's website, which will usually have an "Investors" section if it is listed.

The aim is not to pick shares. It is to get used to the idea that a share price is attached to a real business you can describe.