What investing is and how the stock market works
- Explain the difference between saving and investing
- Describe what owning a share means
- Know why share prices move every day
Saving versus investing
Saving means setting money aside where it stays stable, such as a bank account. Its value in dollars barely moves, which is exactly its job: it is there when you need it.
Investing means buying something you expect to grow in value or pay you income over time, accepting that its value will go up and down along the way. You give up certainty in exchange for a chance at a higher long-run return.
Most people need both. A common rule of thumb is to keep an emergency fund in savings first, then invest money you will not need for at least several years.
What a share actually is
A company is owned by its shareholders. When a business such as a coffee chain or a software maker splits its ownership into millions of equal pieces, each piece is a share. Owning one share of a company with 1 billion shares means you own one billionth of it.
Owners have a claim on the company’s future profits. Some companies pay part of their profit to shareholders as dividends; others reinvest everything to grow. Either way, the value of a share ultimately depends on how much cash the business is expected to produce over its lifetime.
Why there is a market
Companies sell shares to raise money, often in an initial public offering (IPO). After that, most trading is between investors: when you buy a share on an exchange, you usually buy it from another investor, not from the company.
The stock market is the network of exchanges and brokers where these trades happen. Prices are set by supply and demand. If more people want to buy a stock than sell it at today’s price, the price rises until enough sellers appear, and the reverse.
Why prices move every day
Prices change when investors change their expectations about a company’s future cash, or how much they are willing to pay for that cash today. News about sales, interest rates, competition or the economy all shift those expectations.
In the short run, emotion and crowd behaviour also move prices. Over long periods, company results tend to matter much more. That is why investors talk about the market being a voting machine in the short run and a weighing machine in the long run.
Imagine a bakery chain is split into 1,000,000 shares and the market price is $20 per share. The whole company is valued at 1,000,000 × $20 = $20 million. This total is its market capitalisation.
If you buy 50 shares for $1,000, you own 0.005% of the bakery. If investors later expect the chain to open many profitable new stores and the price rises to $24, your shares are worth $1,200. Nothing about your ownership changed; other investors simply agreed to pay more for the same piece.
Key terms
- Share (stock)
- A unit of ownership in a company.
- Shareholder
- A person or institution that owns shares and therefore part of a company.
- Dividend
- A cash payment a company makes to its shareholders out of profits.
- Initial public offering (IPO)
- The first time a company sells its shares to the public on an exchange.
- Market capitalisation
- Share price multiplied by the number of shares: the market’s total value for a company.
- Stock market
- The network of exchanges and brokers where investors buy and sell shares.
Pick a company whose products you use. Open it in Stock Analysis and find its market capitalisation in the Fundamentals card. Write one sentence on what you think investors expect from it.
Key takeaways
- A share is a small piece of ownership in a real business.
- Prices are set by buyers and sellers and change as expectations change.
- Short-term moves are noisy; long-term value follows the business.
- Keep money you need soon in savings, not investments.