What Is the Stock Market and How Does It Actually Work?

What a share actually is

A share is a unit of ownership in a company. Owning one share of a company with ten crore shares outstanding makes you the owner of one ten-crorth of that company.

Ownership carries real rights: a claim on the company's profits if and when it distributes them as dividends, a vote on certain company matters, and a claim on what remains if the company is wound up — after everyone it owes money to has been paid, which is why shareholders are described as having a residual claim.

Equity is the general word for this ownership stake. A share is how that stake is divided into tradable units.

Primary market: where shares are created

The primary market is where a company issues shares and receives the money. The best-known route is an Initial Public Offering, where a company offers shares to the public for the first time and lists them on an exchange. Companies already listed can raise further capital through follow-on offers or a rights issue to existing shareholders.

This is the only stage at which buying a share puts money into the company. It is also the stage that is heavily regulated by SEBI, which governs what must be disclosed in the offer document so that investors can assess what they are buying.

Secondary market: where shares change hands

Once shares are listed, they trade between investors on the secondary market. When you buy a share on the exchange, you are buying it from another investor who is selling — not from the company. The company receives nothing and its balance sheet is unaffected.

This distinction surprises people, and it matters. Almost all of the buying and selling you hear about is secondary-market activity: a transfer of ownership between two investors at a price they agree on.

The secondary market's real purpose is liquidity. Because you can sell to someone else, the money you put into a share is not locked up until the company chooses to return it — and that ability to exit is what makes people willing to invest in the first place.

NSE and BSE

An exchange is the regulated marketplace where that trading happens. India's two main exchanges are the National Stock Exchange and the BSE, both regulated by SEBI.

They do the same essential job: match buyers with sellers, publish prices, and ensure trades are settled so that the buyer reliably gets the shares and the seller reliably gets the money. Many companies are listed on both, and their prices on the two exchanges track each other closely because any meaningful gap would be traded away.

Each exchange also publishes indices — the Nifty 50, the Sensex — which track a defined basket of companies and are used as a broad measure of market movement and as benchmarks for funds.

What you need to take part

Three things sit behind every stock transaction in India, and it helps to know which does what.

• A trading account, opened with a SEBI-registered broker, is what you use to place buy and sell orders on the exchange.
• A demat account holds your shares in electronic form with a depository. Physical share certificates are long gone; a demat account is the modern register of what you own.
• A bank account, linked to both, is where the money moves from and to.
• Opening these requires KYC — identity and address verification, PAN and the prescribed documents — which is a regulatory requirement, not a broker's preference.

What happens when you place an order

You place an order through your broker, who routes it to the exchange. The exchange's order book matches it against an opposite order at a compatible price. When a match occurs, a trade is executed.

The trade is then cleared and settled: the shares move into the buyer's demat account and the money moves to the seller, through the clearing corporation, on the settlement timeline prescribed by the regulator. Settlement is what makes the market trustworthy — you are not relying on a stranger to keep their word.

How a price gets set

There is no committee setting share prices. The price is simply the level at which the most recent buyer and seller agreed to trade, and it moves as the balance of willing buyers and sellers changes.

Market capitalisation — the share price multiplied by the number of shares outstanding — is the market's overall valuation of the company. It is also how companies are grouped into large cap, mid cap and small cap, which is the same classification that defines several mutual fund categories.

How this connects to mutual funds

An equity mutual fund buys and holds shares on the secondary market on behalf of its unit holders. When you invest in an equity scheme, you are indirectly holding a portfolio of shares, without needing to choose them or place the orders yourself.

This is why the concepts carry across. A scheme's NAV moves because the market prices of the shares it holds move. A scheme's market-cap category reflects the size classification above. And a scheme's beta measures how much its portfolio moved relative to an index published by an exchange.

What this article is not

This explains the mechanism, not what to buy. Nothing here suggests any company, any share or any time to transact, and "how to invest in the stock market" means understanding the process and the risks — not receiving a recommendation.

Share prices can fall as well as rise, and an individual company can lose most or all of its value for reasons no process explanation will protect you from. MutualFundAdvisor.in is a Mutual Fund Distributor and provides investor education; it does not offer stock recommendations or execute stock transactions.