Beginner guide
What is a stock? Shares explained simply
"Stocks", "shares", "equities" — the words sound intimidating, but the idea underneath is simple: you're buying a small piece of a real company. Here's exactly what that means.
A stock is a slice of a company
A company divides its ownership into units called shares. Buy one and you literally own a slice of that business — its offices, its brand, its future profits. If a company is split into 1,000,000 shares and you hold 1,000, you own 0.1% of the whole company.
Why would a company sell shares?
To raise money. Instead of borrowing, a company can sell slices of itself to the public — first at an event called an IPO (initial public offering) — and use the cash to grow. In return, buyers become part-owners who benefit if the company does well.
The two ways you make money
- Capital growth — the share price rises above what you paid, so your slice is worth more than before. You realise it when you sell (or just watch it grow).
- Dividends — some companies pay out a portion of their profits to shareholders, usually a few times a year. It's like a small thank-you cheque for owning the business.
Why do share prices go up and down?
A share is worth whatever someone will pay for it right now — it's set by supply and demand. When more people want to buy than sell (often because they expect the company to do well), the price rises. When more want to sell, it falls. News, profits, interest rates and plain human emotion all push those expectations around, second by second.
Short term, prices swing on mood and news. Long term, they tend to follow how much the underlying businesses actually earn.
Where are shares bought and sold?
On a stock exchange (like the London Stock Exchange or the New York Stock Exchange) — a giant, regulated marketplace. You don't go there yourself; you use an online broker or investing app that connects to it on your behalf.
See it in action — for free
Stock Classroom turns all of this into interactive lessons: buy a practice share, watch the price move, read a real quote — with no real money at risk.
Start the free course → How to start investingFrequently asked questions
What is a stock in simple terms?
A small slice of ownership in a company. Own a share and you own a piece of that business and a claim on its future profits.
Stock vs share — what's the difference?
Almost the same thing. "Stock" is ownership in companies generally; a "share" is one unit of it.
How do you make money from stocks?
Capital growth (the price rises above what you paid) and dividends (a share of the company's profits paid to shareholders).
Stock Classroom is educational and does not provide financial, investment or tax advice. Investing involves risk, including the possible loss of the money you invest. Always do your own research or consult a qualified, regulated adviser before making decisions.