What a share actually is, and what you own when you buy one

The word is literal. A share is a share of a company, the way a share of a pizza is a share of a pizza. Most of the confusion about the stock market comes from forgetting this and treating a share as a lottery ticket with a company’s name printed on it.

So start with a business you can picture.

A tiffin kitchen with 1,00,000 owners

Say two sisters in Pune run a tiffin service out of a rented kitchen. It makes a profit of 8 lakh rupees a year. They want a bigger kitchen and two delivery vans, which will cost 20 lakh, and the bank will only lend half of it at 14 percent.

So they do what every listed company once did. They divide the business into 1,00,000 equal pieces and sell 40,000 of them to outsiders at 50 rupees each. Twenty lakh comes in. The sisters keep 60,000 pieces, which means they still own 60 percent and still run the kitchen.

If you bought 1,000 of those pieces, you now own one percent of a tiffin business. That is all a share is. Everything else in this course is detail about how that one percent is priced, traded, taxed and protected.

What your one percent gets you

Four things, and it helps to be precise about them.

First, a claim on profits. If the sisters decide to pay out 3 lakh of this year’s 8 lakh profit to the owners, your one percent is 3,000 rupees. That payment is a dividend. Notice the word “decide”. A company can keep every rupee of profit to grow, and many good ones do. Dividends are a choice, never a promise.

Second, a vote. Shareholders elect the board of directors, approve big decisions and can turn up to the annual general meeting and ask awkward questions. With one percent your vote rarely changes anything, but it exists, and it is why promoters who own 60 percent cannot simply do as they please without paperwork.

Third, a claim on what is left if the business is wound up. Last in line, after the bank, the suppliers and the staff have been paid. Often nothing is left. This is the part people skip.

Fourth, and this is the one that creates the stock market: the right to sell your pieces to somebody else, at whatever price the two of you agree on.

What it does not get you

You cannot walk into the kitchen and change the menu. You cannot ask the company for your 50 rupees back; the company spent it on vans. If the tiffin service goes bankrupt, your 1,000 shares become worthless, but nobody can come after your house for the company’s debts. That last point has a name, limited liability, and it is the reason share ownership is safe enough for ordinary people. You can lose what you put in and no more.

Hold on to that sentence. In a later lesson on futures and options you will meet instruments where it stops being true.

Face value is not price

Every Indian share has a face value printed on it, usually 1, 2, 5 or 10 rupees. It is an accounting number from the day the company was born and tells you almost nothing about what the share is worth today. A share with a face value of 10 rupees can trade at 3,000 rupees or at 4. Beginners sometimes see a “10 rupee share” quoted at 2 rupees and think it is cheap. It is not cheap. The market has concluded the company is in trouble.

The price is simply the last figure at which a buyer and a seller agreed. On the exchange that happens thousands of times a second for a large company, which is why the number flickers.

Why the price moves

A share price is a running vote on the company’s future profits, held by millions of people who disagree with each other.

Two things feed that vote. One is information: quarterly results, a new factory, a scandal, a change in the price of crude oil, a rate decision by the Reserve Bank. The other is mood. In a nervous month people will pay less for the same rupee of future profit than they will in a cheerful one. Over a few weeks mood can dominate. Over ten years profits dominate. Most of this course is about learning to tell the two apart.

Where shares come from, and where they trade

When the sisters sold 40,000 new pieces to raise money, that was the primary market. When a listed company does it for the first time on an exchange it is called an initial public offering, an IPO. The money goes to the company.

Every trade after that is the secondary market. When you buy 10 shares of Tata Consultancy Services tomorrow, TCS does not receive a rupee. You are buying from another investor who wants out, through the exchange, which matches the two of you and guarantees the trade settles.

India has two exchanges that matter. The BSE on Dalal Street in Mumbai dates from 1875, which makes it the oldest in Asia. The National Stock Exchange started trading in 1994 and now handles most of the volume. A share listed on both trades at nearly the same price on each, because anyone who spots a gap buys on the cheaper one and sells on the dearer one until the gap closes.

Size: large, mid and small

Multiply the share price by the number of shares that exist and you get the market capitalisation, the price tag the market puts on the whole company. A 3,000 rupee share of a company with 1 crore shares and a 30 rupee share of a company with 100 crore shares have the same market cap. Price per share tells you nothing about size.

SEBI sorts listed companies by market cap into three buckets, and mutual funds are bound by the list. The 100 largest are large caps, the next 150 are mid caps, and everything from the 251st company down is a small cap. The Association of Mutual Funds in India publishes the list every six months. Large caps are not safe and small caps are not doomed, but as a rule the further down the list you go, the more a share price swings and the less information there is about the business.

Three ways to make money, two ways to lose it

You make money when the price rises and you sell, when the company pays a dividend, or when the company buys back its own shares at a premium. You lose money when the price falls and you sell, or when the company fails. There is a quieter fourth way to lose: holding a share for years while a plain index fund did better. We will measure that in the next chapter.

Things that are not shares

A mutual fund unit is a slice of a basket of shares (or bonds) that a fund manager picked. An exchange traded fund is a basket that trades on the exchange like a share. A bond is a loan: you are the lender, you get interest, you own nothing. People mix these up in conversation all the time. Keep the distinction straight, because the risks and the taxes differ.

Try this before moving on

Write down three companies whose products you used today. The phone network, the toothpaste, the bank app, the petrol pump. Search each name on the NSE website and find two numbers: the market cap and the sector. You have just done the first thing every investor does, which is to notice that the economy you live in is listed.

The size buckets are those defined by SEBI and published by AMFI. Written in November 2026; the list is revised every six months, so look up the current one.