Risk and return

Two sides of every investment

Every investment has a return — what it earns you, through interest, dividends or a rising price — and a risk: the chance that the return turns out lower than you expected, or that you lose money.

Except for the simplest things, like a bank deposit, you never know the return in advance. What you can judge is the expected return — what it might reasonably earn — and how wide the range of possible outcomes around it is. A wide range is what makes an investment risky, whatever its average.

Why more return comes with more risk

Imagine two investments that cost the same. One pays a sure, fixed amount. The other might pay more, or might lose money. If both were expected to earn the same, nobody would choose the uncertain one. So the riskier investment has to offer a higher expected return to find buyers at all.

That is the whole rule: investors are paid for carrying risk. It works in one direction only. Risk is the price of a higher expected return, not a guarantee of one — a risky investment can simply lose.

Ups and downs, and losses that stay

The prices of investments move — some gently, some wildly. How much and how fast a price swings is called volatility. A share whose price moves 3% on an ordinary day is more volatile than a government bond whose price barely moves.

Volatility is uncomfortable, but it is not the same as losing money. If a price falls and later recovers, and you did not sell in between, the fall cost you nothing but worry. A permanent loss is different: the company fails, the borrower does not repay, or you sell at the bottom and the loss becomes real.

Time changes the picture

Your time horizon is how long you have until you need the money. It decides how much volatility you can live with.

If you need the money in a year, a 30% fall just before then is a real loss — you have to sell anyway. If you need it in fifteen years, the same fall is a bad year in the middle of a long journey, and there is time for the price to recover — though nothing guarantees that it will.

Time does not remove risk. A company that fails does not come back, however long you wait. What a long horizon gives you is the chance not to be forced to sell at a low.

A ladder of risk

Common investments can be lined up from lower risk to higher. Groups like these are called asset classes. Each step up offers a higher expected return and a wider range of outcomes — in the bad direction as well as the good one.

1. Cash and bank deposits. The amount is known and easy to reach. The return is the interest rate, which may not keep up with inflation.
2. Bonds. A loan that pays fixed interest. Bonds of stable governments sit near the bottom of the ladder; bonds of weaker companies pay more because they are more likely not to pay back. Bond prices also move when interest rates change.
3. Broad stock funds. A fund that holds the shares of hundreds of companies, such as an index fund. Its price swings with the whole market and can fall a lot in a bad year, but the failure of one company barely moves it.
4. Single stocks. One company. The range of outcomes is the widest: it can grow many times over, or go to zero.

This order describes risk in general, not what will happen in any particular year. In a given year a bond fund can lose money, and a single stock can do better than everything else.

Where you stand on the ladder

There is no right step for everyone. What fits depends on your time horizon, on how much you can afford to lose, and on whether you could watch your savings fall by a third without selling. Many investors hold several steps at once — some cash, some bonds, some stocks — so that no single one decides everything. That idea, diversification, has its own lesson at the end of this path.

In short

Return and risk come together: a higher expected return is the payment for carrying more risk, never a guarantee. Ups and downs are not the same as a permanent loss, but a fall becomes real when you have to sell. The longer you can wait, the more ups and downs you can sit through.