Understanding Risk: More Than Just Losing Money

Risk is one of those investment words everyone uses, but few stop to define. Is risk the chance of losing money? Is it volatility? Or is it simply the uncertainty of not knowing what happens next? The answer matters because once we understand risk, we can measure it and, more importantly, understand where it is coming from.

1. What is risk? Uncertainty or simply the unknown?

At its simplest, risk is uncertainty about future outcomes. An investment may rise, fall or move sideways, and the investor cannot know with certainty which outcome will occur.

But there is an important distinction between risk and uncertainty. Risk generally refers to situations where the possible outcomes can be identified and probabilities can be estimated. Uncertainty goes a step further: the outcomes, or their probabilities, may not even be known.

Consider a company reporting strong earnings. An investor may expect the share price to rise, but the market could react differently. Perhaps expectations were even higher, or management issued cautious guidance. The investor faces risk because the future outcome is not guaranteed.

This is why risk should not be viewed purely as the possibility of losing money. A share that can move sharply in either direction carries uncertainty, even if the investor ultimately makes a profit. Understanding that uncertainty is the first step towards managing it.

2. How do we measure risk?

If risk is uncertainty, how can we put a number to it?

Investors use several measures, because no single statistic captures every type of risk. One of the most common is volatility, often measured using standard deviation. It shows how widely an investment’s returns have fluctuated around their average. Higher volatility generally means a wider range of potential outcomes.

Beta provides another perspective. It measures how sensitive an investment has historically been to movements in the broader market. A beta above one suggests the investment has tended to move more than the market, while a beta below one suggests smaller movements.

Then there is drawdown, which focuses on the decline from a previous peak. For many investors, this is particularly intuitive. A portfolio falling 30% is not just a statistic. It represents a substantial loss that must eventually be recovered.

These measures are useful, but they are not interchangeable. Volatility does not tell us everything about fundamental business risk, beta does not capture every source of uncertainty, and historical measurements cannot predict the future with certainty.

Risk measurement is therefore less about finding one perfect number and more about understanding different dimensions of risk.

3. Factor risk: What is really driving your investment?

Here is where risk becomes more interesting.

An investor might look at a portfolio containing a bank, a property company and an industrial company and assume it is well diversified because the businesses are different. But what if all three are heavily influenced by interest rates?

Suddenly, the portfolio may have more in common than it appears.

This is factor risk: exposure to underlying forces that can affect multiple investments at the same time. Common factors include interest rates, inflation, economic growth, commodity prices, currencies and broad market movements.

Take South African investors as an example. A portfolio can contain several different JSE-listed companies, yet still be heavily exposed to the local economy. A weaker rand can also affect multiple companies differently, while changes in commodity prices can influence both miners and businesses linked to the broader economy.

This is why diversification is not simply about counting how many investments you own. Ten investments can still represent one concentrated bet if they are all driven by the same underlying factor.

The goal is not to eliminate risk. That is impossible. Instead, investors should understand what risks they are taking, how those risks can be measured, and which factors could cause several positions to move together.

For traders and investors, this is where disciplined risk management begins. ProTrade combines market insights, trade ideas and execution support to help clients make more informed trading decisions. Understanding the risk behind a position is just as important as identifying the opportunity.