What a share of stock really is

A friend opens a coffee cart. It costs £10,000 to fit out — machine, fridge, the cart itself. She doesn’t have £10,000. Neither do you. So four of you each put in £2,500. From that morning, the cart is owned in four equal slices. You hold one. That slice is a share. You didn’t buy a coupon, a bet, or a number on a screen. You bought a quarter of a real business — its espresso machine, its morning queue, and its profits.

Hold that picture. It’s the whole idea, and almost everyone loses it the moment the business is big and the slice is bought on a screen.

A share is a slice of a business

A company that “goes public” does exactly what your friend did, only bigger. It cuts ownership of itself into millions of identical slices — shares — and sells them. Buy one share and you own one of those slices. Buy a thousand and you own a thousand. You are, in plain fact, a part-owner of that company: its buildings, its brand, its staff’s work, and — the part that matters — the money it earns.

The screen shows a price that jumps around all day. That makes a share look like a lottery ticket whose number wiggles. It isn’t. Underneath the wiggling number sits a thing that actually earns money. A lottery ticket pays only if a number is drawn; nothing beneath it works. A share pays because the business beneath it works.

Where the money actually comes from

Owning a slice of a business pays you in two ways, and both come from the business doing well — not from the screen.

• Dividends. When the company makes a profit, it can hand some of that cash straight to its owners. Own 0.1% of the company, get 0.1% of the cash it pays out.
• Growth. The company can instead reinvest its profit — open new outlets, build a better product — so next year it earns more. A business that earns more is worth more, so your slice is worth more. You could sell it to someone else for more than you paid.

That’s it. Dividends are profit paid to you now; growth is profit reinvested so your slice is worth more later. A share’s worth, over a long enough stretch, follows the earnings of the business under it — not the day’s mood.

A worked example: Brightwater

Brightwater bottles spring water. It has cut itself into 1,000,000 shares. Last year it earned £2,000,000 in profit. You own 1,000 shares — that’s 0.1% of the company.

Your slice of last year’s profit is 0.1% of £2,000,000 = £2,000.

Brightwater’s owners decide to pay out half the profit and reinvest the other half. So:

• Half of £2,000,000 is paid as dividends. Across 1,000,000 shares that’s £1 per share. You hold 1,000 shares, so a cheque for £1,000 lands in your account. Real cash, from the business earning.
• The other £1,000,000 buys a new bottling line. Next year Brightwater makes more bottles, earns — say — £2,400,000. Your 0.1% slice is now worth more, because the thing you own a slice of now earns more.

Notice what did the work. Not a hunch, not a chart, not luck. A business sold water at a profit and shared it with the people who own it. You were one of them.

And the mirror holds: if Brightwater’s spring runs dry and profit falls to zero, your dividend is zero and your slice is worth far less. Owning the upside means owning the downside too. (That trade — more reward, more risk — is its own lesson, two items from now.)

The whole, not the ticker

Zoom out from one cart, one bottler. A stock market is just an enormous room where slices of thousands of real businesses change hands every second. Behind every ticker symbol are people — bakers, engineers, drivers, clerks — turning up to work and making something. When you own a share, you’re not watching the economy from the stands and betting on the score. You’re a part-owner of the people making things, and they’re working on your behalf as much as their own.

That’s worth sitting with. It should make anyone slower to call a company “a winner” or “a dog” from its price alone. The price is one day’s opinion. Underneath it is a living business run by strangers, and you own a piece of it. Seeing that is the start of reading the whole market — not as a casino, but as ownership. What that ownership is worth, and why its price lurches around so much, is where the rest of this course goes — starting, next, with the calmer cousin of the share: the bond.