Risk, time horizon, and staying invested

Risk in investing is not a mood, and it is not a number on a quiz you forget by Thursday. It is the chance that you need the money, or lose your nerve, before the investment has done the job you hired it for.

Time horizon is the other half of that sentence. The same fund is a different decision for money needed in two years and money needed in twenty.

Volatility is not the same as loss

A globally diversified share fund moves. In a bad year the quoted value can drop by a lot. If you do not sell, that drop is a lower price, not yet a finished loss. If you sell, it is finished.

People use “risk” to mean the wobble and also to mean “I might end up with less than I put in.” Both matter. The wobble is guaranteed in a share portfolio. The permanent shortfall is what your horizon and your behaviour decide.

Bonds and cash wobble less and, over long periods, have usually grown less than shares. “Usually” is doing a lot of work in that sentence. Past patterns are not a schedule.

Match the mix to the date

Write the date you might need the money, not the date you hope to be rich.

• Money you might need within a few years belongs mostly in cash, even if inflation nibbles it. See why cash loses ground to inflation.
• Money with a decade or more can carry a high share of global equities, if you can watch it fall without turning the fall into a sale.
• Money in between needs a blend you can name in advance, not a blend you renegotiate after every headline.

A target-date style thought is enough: more shares when the date is far, more cash and short-term holdings as the date arrives. You do not need a product called “target date” to do this. You need a rule. How to rebalance a portfolio once a year is that rule in its smallest form.

The risk you actually take

Beginners often take more risk than the fund name suggests, because they concentrate. One employer’s shares, one country’s index, one theme that has already risen. Concentration is a choice to let a smaller set of outcomes dominate. That can work. It is not the same product as a global fund, and it should not be described as “the market.”

Index funds versus individual stocks separates those bets. A simple global ETF portfolio is the low-concentration version.

Staying invested is the hard part

The plan fails in a specific room: you, a phone, a red number, and no rule. You will feel certain that this time is different. Sometimes the feeling is right and the world has changed. Even then, a rushed sale of a broad fund is rarely the cleanest response, because you have to be right twice — when to leave and when to come back.

Practise the fall before it happens. Decide, on a calm day, what drop would make you reduce risk, and write the action. “I will feel awful and do nothing to the core fund” is a valid instruction.

Automation helps. A monthly contribution that continues through a decline buys more shares at the lower price. That is the useful side of dollar-cost averaging. It is not magic. It is a way to stop your mood from setting the amount.

A broker will not hold your nerve for you

An app can remind you, pie your contributions, and show a chart. It cannot decide your horizon. When you are ready to hold the investments somewhere that accepts small monthly amounts, you can open Trading 212 with this referral link (referral link, opens in a new tab). Prefer the Invest account if you want to own funds and shares. Contracts for difference are a different, sharper risk and they are not the subject of this journal.

Before you fund anything, read beginner investing mistakes. The expensive one is using a long-term product for a short-term need, then calling the result bad luck.