Periods of geopolitical tension inevitably cause anxiety for investors. Recent developments in the Middle East have once again reminded us how quickly global markets can react to uncertainty. Headlines become more dramatic, commentators predict the worst, and market volatility often follows. At times like these, the most important factor influencing investment outcomes is not the news itself, but how investors react to it.
One of the most powerful ideas in behavioural finance is that successful investing often requires doing the opposite of what your instincts tell you to do.
When markets fall, the natural emotional response is fear. Seeing portfolio values drop can trigger a strong urge to “do something”, often meaning selling investments to avoid further losses. This reaction is deeply human. Psychologists refer to it as loss aversion: we feel the pain of losses much more strongly than the pleasure of gains.
However, history shows that acting on this instinct is usually the wrong move.
Markets are forward-looking. When geopolitical events occur, whether wars, political crises, or economic shocks, markets often react quickly and sharply. Yet over time, markets have repeatedly demonstrated a remarkable ability to recover and continue growing. Investors who sell during periods of panic frequently lock in losses and then face the difficult decision of when to re-enter the market. Unfortunately, the recovery often begins when sentiment is still negative, meaning those who exited may miss the rebound.
This creates what is sometimes called the behaviour gap, the difference between the return markets generate and the return investors actually experience because of emotional decision-making.
Paradoxically, the moments when investing feels most uncomfortable are often the moments when discipline matters most. When markets are rising strongly and confidence is high, investing feels easy, but valuations can be stretched and risks higher. When markets are volatile and headlines feel unsettling, investing feels difficult, yet opportunities may be improving as prices adjust.
In other words, successful investing often means doing the opposite of the crowd.
During periods of uncertainty, the most effective strategy for long-term investors is usually the simplest: maintain a well-diversified portfolio and stay focused on long-term objectives. Global portfolios are designed precisely with these kinds of events in mind. Diversification across regions, asset classes, and sectors helps cushion the impact of individual shocks.
It is also important to remember that geopolitical crises are not new to markets. Over the past several decades investors have navigated oil shocks, wars, financial crises, terrorist attacks, pandemics, and political upheaval. Each felt deeply uncertain at the time, yet global markets have continued to grow over the long term.
This does not mean volatility disappears, it simply means it is part of the journey.
For long-term investors, the greatest risk often comes not from market events themselves but from reacting emotionally to them. Staying disciplined, maintaining perspective, and avoiding knee-jerk decisions are key components of successful investing.
So, when markets feel unsettling and the temptation to act becomes strongest, it is often worth pausing and remembering a simple principle of investment psychology: if your instincts are telling you to panic, the most sensible course of action may well be to stay the course.
