Stock market basics for beginners, in plain words

What is a share?

A share is a small piece of ownership in a company. If you own one share of a company, you own a tiny part of that business, and you are called a shareholder.

Think about a made-up mobile company, ABC Limited. When you recharge your phone with ABC, you are a customer: you pay money and you get a service. That is the whole relationship.

Now picture ABC Limited as one big pizza. The company cuts the pizza into many equal slices. Each slice is one share. If you hold one slice, you own a small part of ABC. You are no longer only a customer. You are a part-owner.

A real company is cut into far more slices than any picture can show, often crores of them, so one share is a very small part. Being a part-owner usually means three things:

• The value of your slice can go up or down as people change their view of the company.
• If the company decides to share some of its profit with owners, you may receive a payment called a dividend. Many companies pay none.
• You may get a vote on some company decisions, in proportion to how many shares you hold.

You will hear "share" and "stock" used for the same thing. In everyday Indian usage, both mean a piece of ownership in a listed company.

Why do companies list on the stock market?

A company may list its shares to raise money from the public, to give existing shareholders a public market for their shares, or both. In return, it must follow strict rules and tell the public about its business regularly.

Imagine ABC Limited wants to build towers in more towns. It could borrow from a bank, but a loan must be repaid with interest. Another way is to offer new slices of the company to the public. A company's first public offer of shares is called an Initial Public Offering, or IPO. After listing, those shares can trade on the stock exchange.

Listing also helps people who already own ABC, such as its founders, early staff and early investors. Before listing, selling a slice meant finding a buyer privately. After listing, there is a public place where buyers and sellers meet every working day.

Listing comes with duties. A listed company has to publish its results at fixed intervals, disclose important events and follow rules on how it treats shareholders. These rules require listed companies to make their results and other important information public through the exchanges.

What does a stock exchange do? (NSE and BSE)

A stock exchange is the organised marketplace where buyers and sellers of shares are matched. India's two main stock exchanges are the National Stock Exchange (NSE) and BSE.

An exchange does not decide prices and does not sell you shares itself. It runs the system where orders from buyers and sellers arrive, and it matches them by fixed rules. When a buy order and a sell order agree on a price, a trade happens.

The exchange also sets the rules for which companies can list, watches trading for unusual activity and publishes prices so that everyone sees the same numbers. Many companies are listed on both NSE and BSE, so the same share can trade in two places at almost the same price.

You may hear about the Nifty 50 and the Sensex. These are indices: a single number that tracks the prices of a chosen group of large companies. The group is reviewed from time to time, so companies can be added or removed. An index is a quick way to see whether the market as a whole moved up or down on a given day. It is a summary, not a share you own.

For the normal equity cash market, the regular trading session runs from 9:15 to 15:30 IST on exchange trading days.

What does SEBI do?

SEBI, the Securities and Exchange Board of India, is the regulator of India's securities market. It makes the rules, registers the firms and people who work in the market, and acts when the rules are broken.

Think of SEBI as the referee. It does not play, it does not pick a winner, and it does not tell you which share to buy. Its job is to keep the game fair and to protect investors.

In practice, SEBI:

• sets rules for exchanges, brokers, listed companies and mutual funds;
• registers market intermediaries, such as stockbrokers, depository participants and research analysts, and publishes their registration details on its website;
• investigates misuse such as insider trading or price manipulation, and can penalise those involved;
• provides SCORES, an online platform for complaints involving listed companies and SEBI-registered entities. You first take the complaint to the company or entity concerned.

One point every beginner should remember: a SEBI registration means a person or firm is allowed to provide a certain service under SEBI's rules. It is not an approval of their opinions, products or courses. You can check any registration number yourself on SEBI's list of recognised intermediaries before you trust someone. Registration granted by SEBI and certification from NISM in no way guarantee performance of the intermediary or provide any assurance of returns to investors.

What are a demat account and a trading account?

A demat account holds your shares in electronic form, like a bank account holds money. A trading account is what you use to place buy and sell orders on the exchange. Most beginners open both together through one SEBI-registered stockbroker.

Long ago, shares were paper certificates. Today they are electronic records. "Demat" is short for dematerialised, which simply means "not on paper". In India, these records are kept by two depositories, NSDL and CDSL. You do not deal with them directly. You open your demat account through a depository participant, which is often your stockbroker.

The trading account is the other half. When you decide to buy a share of a company, the order goes from your trading account to the exchange. Most equity trades settle on the next working day (T+1), when the share reaches your demat account. An optional same-day (T+0) settlement also exists for some shares.

A simple way to remember it:

• Trading account: where your buy and sell orders are placed.
• Demat account: where the shares you own are recorded electronically.
• Bank account: where the money comes from and goes back to.

To open these accounts you complete KYC (know your customer) checks with your PAN and identity documents. Broker and depository charges vary. They can include brokerage, account charges, transaction charges, taxes and other statutory fees. Read the current fee schedule before you choose. We do not recommend any broker.

How is a share price formed?

A share price is simply the last price at which a buyer and a seller agreed to trade. If more people want to buy than sell at the current price, the price tends to rise. If more want to sell, it tends to fall.

Let us watch a few moments of trading in ABC Limited. All the numbers are made up.

• Buyers are waiting with orders: one person will pay Rs 100 for a share, another Rs 99, another Rs 98. The highest price a buyer is willing to pay is called the bid.
• Sellers are waiting too: one will sell at Rs 101, another at Rs 102. The lowest price a seller will accept is called the ask.
• Nobody trades yet, because the highest bid (Rs 100) and the lowest ask (Rs 101) do not match.
• Now a new buyer arrives who wants the share right away and accepts Rs 101. A trade happens at Rs 101. That becomes the latest price shown on every screen.

Why would buyers suddenly pay more, or sellers accept less? Because people react to information and to each other. ABC might publish its results. There might be news about the telecom sector, interest rates or the economy. Sometimes prices move simply because many people feel hopeful or fearful at the same time.

This is why a price is not a fixed "value" stamped on the company. It is the meeting point of many opinions, and it changes all day as those opinions change.

Investing and trading: what is the difference?

Investing usually means buying a part of a business and holding it for years because you understand the business. Trading usually means buying and selling over days, hours or minutes to try to gain from price movements. Both carry the risk of loss.

The difference is mostly about time, reason and effort:

• Time. An investor in ABC Limited may hold the share for many years. A trader may hold it for a day or less.
• Reason. An investor asks, "Is ABC a business I want to own a part of?" A trader asks, "Where might the price move next, and what will I do if I am wrong?"
• Effort and attention. Trading needs close attention to prices, strict rules for exits and a clear limit on how much you can lose. Investing needs patience and a habit of reading what the company publishes.

Neither path is promised to make money, and neither is right for everyone. Some people decide, after learning, that they do not want to take part in the market at all, and that is a sensible decision too. The aim of learning is to understand what you are doing before you put money at risk.

Common beginner mistakes to watch for

Beginners can get into trouble through a few habits: acting on someone else's tip, risking money they cannot afford to lose, and taking a position without understanding the downside.

These are cautions, not rules for success. Watch for them in yourself:

1. Acting on tips from groups or strangers. A message promising a sure profit is a warning sign. Check whether the sender is SEBI-registered, and remember that even a registered person cannot promise returns.
2. Using money you will need soon. Money for rent, fees or emergencies should not be in shares, because prices can fall and stay down for a long time.
3. Borrowing to buy shares. Losses on borrowed money still have to be repaid.
4. Jumping into futures and options first. These are complex products. SEBI's August 2026 study found that 87.7% of individual traders in equity derivatives made a net loss in FY26 (April 2025 to March 2026). Beginners should understand these risks before considering them.
5. Putting everything into one company. If that one company has a bad year, all your money feels it.
6. Chasing a price after a big jump. Buying only because a share "is going up" means you are reacting to the crowd, not to a reason.
7. Ignoring costs. Brokerage, taxes and other charges add up, especially if you place many orders.
8. Not understanding the downside. Before risking money, understand how much you could lose and what you would do if the price moves against you.

A short glossary of 10 terms

These ten words come up again and again. Each one is explained in a single line so you can come back to this list any time.

Share (stock)

A small unit of ownership in a company.

Stock exchange

The organised marketplace where buy and sell orders are matched, such as NSE and BSE.

Index

One number that tracks the prices of a chosen group of companies, such as the Nifty 50 or the Sensex.

IPO

Initial Public Offering, a company's first public offer of shares.

Demat account

An account that holds your shares in electronic form.

Trading account

The account you use to place buy and sell orders through a stockbroker.

Bid and ask

The highest price a buyer will pay right now, and the lowest price a seller will accept.

Limit order

An order to buy or sell only at a price you set, or better. A market order instead trades at the price available now.

Dividend

A part of a company's profit paid to its shareholders, if the company decides to pay one.

Volatility

How much and how quickly a price moves up and down. Higher volatility means bigger swings, both ways.