What Is a Stock

A share is a fraction of a real business

A stock is a unit of ownership in a company. Buy one share and you hold a legally defined slice of that business, including a proportional claim on its assets and on whatever profit is left after everyone else has been paid. A share is not a betting slip attached to a ticker. It is a title to part of a company with buildings, staff, contracts and customers.

That distinction matters more than it sounds, because most beginner mistakes come from forgetting it. A price on a screen invites you to treat the number as the asset. The number is only what the last two people agreed on. The asset is the business underneath it.

What 100 shares of a 1.2 billion share company actually buys

Arithmetic makes the claim concrete. Take a company with 1.2 billion shares outstanding trading at $40. Multiply the two and the market values the whole business at $48 billion. Buy 100 shares for $4,000 and you own 100 divided by 1.2 billion, which is roughly 0.0000083% of it.

Now attach that fraction to the accounts. If the company earns $3.6 billion in net profit this year, your slice of that profit is about $300. You do not receive $300. The board decides what happens to it: perhaps $120 arrives as a dividend, and the other $180 stays inside the business to fund new capacity, repay debt or buy back shares. Either way the earnings were attributable to you before the board chose where to put them.

Run the same sum on a company with 40 million shares at $40. The whole business is worth $1.6 billion, so the same $4,000 buys 0.00025% of it, thirty times the ownership stake for identical money. Share price alone says nothing about company size. Only price multiplied by share count does.

The three rights that come attached

• A vote. Ordinary shares usually carry one vote each on matters put to shareholders, including who sits on the board. At 0.0000083% of the register your vote decides nothing, but the mechanism is what keeps a board answerable to the institutions holding millions of shares.
• A claim on profit. If the board declares a dividend you receive it per share held. Many companies pay nothing and reinvest instead, which is a legitimate choice rather than a slight against you.
• A claim on assets, last in the queue. If the company is wound up, lenders, bondholders, tax authorities and preferred shareholders are paid first. Ordinary shareholders receive what is left, which is frequently nothing.

That last line is the one to memorise. Equity is the residual claim. It carries the most upside precisely because it absorbs the loss first.