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

Most people buy their first share before anyone explains what a share is. The app makes it easy. You type a ticker, you press a button, a number appears in your account, and from then on that number goes up and down for reasons nobody has told you. This piece explains what you actually bought.

Everything else on this blog sits on top of this. Order types, charts, options, risk: all of it assumes you know what the underlying thing is. So we start here.

A share is a slice of a company, in law

A company is a legal person. It can own property, sign contracts, borrow money and be sued, separately from the people who run it. Ownership of that legal person is divided into units, and one unit is a share.

If a company has issued one hundred million shares and you hold one hundred of them, you own one millionth of the company. That is not a metaphor or a financial approximation. It is ownership recorded in a register, and it carries rights written into company law and into the governing documents of the company.

The word "stock" is often used for the same thing. In American usage stock tends to mean the whole class of ownership and shares means the individual units, so you own shares of a stock. In practice traders use both words for both meanings and nobody is confused by it.

Where the share you bought came from

This part surprises people. When you buy a share of a large company, the company is almost never on the other side of the trade. It does not receive your money. It does not know you exist.

Shares reach the public once, in a primary offering. A company that wants to raise cash sells newly created shares to investors, and that money goes to the company. An initial public offering is the most famous version of this. After that moment the shares belong to their buyers, and when those buyers want out they sell to somebody else.

That second stage is the stock market as you experience it. It is a resale market. The price on your screen is what the last person paid the person before them. The cash position of the company is untouched by any of it.

This explains something that confuses new traders constantly. A company can be profitable and growing while its shares fall for months, because the share price is set by people trading with each other rather than by an accountant. Those two things are connected over long periods and loosely connected over short ones.

What owning a share actually gives you

Four things, roughly, and the first two are the ones that matter most to a retail trader.

A claim on future profits

Whatever the company earns after paying everyone else belongs to the shareholders collectively. Your slice of that is your slice of the company. The company can hand some of it over as a dividend, or keep it and spend it on the business, which is what most growth companies do.

A dividend is cash paid per share, usually quarterly in the United States. If you own two hundred shares and the company pays fifty cents a share, you receive one hundred dollars. Plenty of large companies pay nothing at all and reinvest instead, and that is a strategic choice rather than a failure.

The right to sell it

You can transfer your share to anyone willing to buy it, at whatever price you agree. On a listed exchange that is instant and anonymous. This right sounds obvious and it is the one that most affects your day to day, because it makes a share liquid, and liquidity is what lets you leave a position at a price close to the one on your screen.

Not every share is equally liquid. A company that trades ten million shares a day will absorb your order without noticing. A company that trades forty thousand shares a day will not, and that difference shows up in the price you actually get.

A vote

Common shares usually carry one vote per share on matters put to shareholders: who sits on the board, executive pay, large acquisitions. With one hundred shares out of one hundred million your vote has no practical effect, and most retail holders never cast one. It is still real, and it is the mechanism by which large holders exert control.

A claim on what is left if the company dies

If a company is wound up, its assets are sold and the proceeds are paid out in a fixed order. Secured lenders first, then bondholders and other creditors, then preferred shareholders, and common shareholders last. This ordering is the single most important thing to understand about risk in a share. You are at the back of the queue by design, and in most bankruptcies the queue runs out before it reaches you.

That is the trade. Shareholders take the worst position if things go badly, in exchange for an uncapped claim on the upside if things go well. A bondholder gets paid first and receives a fixed coupon, no more.

How your ownership is actually recorded

Almost nobody holds shares in their own name any more. When you buy through a broker, the shares are usually held in what is called street name: the broker is the registered holder on the company books, and the broker records internally that the shares belong to you. You are the beneficial owner.

This exists because it makes settlement fast. Transferring an entry in a broker ledger takes microseconds. Reissuing a certificate in a new name takes days. The whole modern market runs on this arrangement and it is why your trade appears in your account immediately.

The practical consequences are small but worth knowing. Company communications reach you through the broker rather than directly. Voting happens by instructing the broker how to vote on your behalf. And your claim in a broker failure is on the broker rather than on the company, which is the reason broker level protections exist at all. Those protections cover a broker failing to return your assets. They do not cover the shares falling in value, and no protection anywhere does.

The number of shares is not fixed

Your slice is your shares divided by all shares outstanding, and the bottom of that fraction moves.

A company can issue new shares, to raise money or to pay staff in equity. That is dilution. If the count goes from one hundred million to one hundred and ten million and you did nothing, your slice shrank by roughly nine percent. The company may have spent the money well and the shares may still be worth more afterwards, but the arithmetic of your ownership moved against you and it is worth noticing when it happens.

A company can also buy its own shares back and retire them, which shrinks the count and grows everyone else slice. Buybacks are a way of returning cash to shareholders without committing to a dividend.

A stock split changes nothing about ownership at all. A two for one split gives you twice as many shares each worth half as much. Your slice is identical. Splits happen mostly to bring the per share price into a range retail buyers find comfortable, and the excitement they generate is usually larger than the event.

Not every share carries the same rights

Some companies issue more than one class. A common arrangement gives founders a class with ten votes per share while the public gets a class with one vote, or with none. The economic claim on profits is typically the same across classes. The control is not.

Several of the largest technology companies are structured this way, which is how a founder with a minority economic stake can still control the outcome of every shareholder vote. If that matters to you, the share class is stated in the ticker and the structure is described in the company annual filing.

What a share is not

A share is not a deposit. No institution guarantees the balance and there is no interest rate. The value of a share can go to zero and has done, many times, including at companies that looked solid a year earlier.

A share is not a claim on company assets that you can enforce on your own. You cannot walk into a warehouse and take one millionth of the inventory. Your claim is on the company as a whole, through the share.

A share is not a promise. A company has no obligation to pay you a dividend, to grow, or to be worth more next year than it is today.

So why does the price move?

Because the price is the outcome of an auction that runs continuously while the market is open, and the participants keep changing their minds. Buyers post what they are willing to pay. Sellers post what they will accept. A trade happens where those two meet, and that trade sets the price you see.

What makes them change their minds is the subject of a later piece in this series. For now the useful idea is that the price is a live opinion poll on the future of the company, not a measurement of its present. Two people looking at identical information can disagree about what a company is worth, and the price is where their disagreement settles for a moment.

How the Den uses this

Every alert posted in the rooms names an instrument before it names a level, and this is why. A call on shares of a company and a call on options over the same company behave differently, carry different risk, and fail in different ways. If you cannot say what the instrument is, the rest of the alert cannot help you.

When an analyst posts a stock idea, the reasoning usually reaches for something in this piece. That the company has to keep earning to justify the price. That there is a queue and shareholders sit at the back of it. That the share is liquid enough to leave when the thesis breaks.

The most useful habit to build now, before you learn a single chart pattern: when you read an idea, ask what would have to be true about the company for it to work, and what would tell you it is not true. A share is a claim on a business. Ideas about it that never mention the business are worth less than they look.

The free rooms are the cheapest place to practise that. Read how a thesis gets argued before you put money behind one.