Sympathy for the Devils...

How war affects markets and what investors can learn from history

A few years ago, I sat across from a client who had just read the morning headlines, which announced Russia had just invaded Ukraine. A whole series of scenarios loomed large, making markets jittery.

Unsurprisingly, this client was worried and considering withdrawing his investments – ‘just until things settle down’.

It’s a conversation I’ve had many times with clients over the years. And it always comes from a place of uncertainty, sometimes even fear. Fear of the unknown. Fear of loss. Fear of doing nothing. Fear that this time things will not recover and that all might be lost.

But history has shown us time and again that sometimes the best thing to do is nothing. Not to cave in to our desire to take our chips off the table. The data shows that, if anything, these are the times we should consider adding to investments. And so the client chose wisely. He did nothing and stayed invested. He continued to trust us to navigate the uncertainty.

Markets hate uncertainty, not war

When war looms, markets often stumble. It’s not necessarily the conflict itself that causes the panic, it’s the uncertainty. Investors don’t know what’s coming next, how the political cards will fall, so they react.

But once the fog begins to lift, history shows us that markets recover. Often faster than you’d expect.

Take World War II. When Hitler invaded Poland in 1939, the world held its breath. But the US stock market climbed 10%. After Pearl Harbour, it dipped briefly – just 2.9% – and bounced back within a month. By the end of the war, the Dow Jones had risen by 50%.

That’s not a fluke. It’s a pattern.

The power of perspective

Most people aren’t aware of this pattern, so when in the middle of the storm and news outlets are reporting the worst, they find it hard to imagine the sun coming out again. Consider these events and the performance of the Dow Jones one year after the event:

History gives us perspective. It reminds us that markets are resilient. That investors who stay the course and resist the urge to react, often come out stronger and wealthier.

Across six major conflicts, from World War II to the Iraq and Afghanistan wars, US large-cap and small-cap stocks have not only recovered, but often outperformed their peacetime averages. During World War II, small-cap stocks surged by over 30%. Even during the Korean War, markets delivered double-digit returns.

Why? Because once the initial shock wears off, markets begin to price in the new reality. Governments often increase spending, particularly in defense and infrastructure, which can stimulate economic activity. Certain sectors, like energy, defence, and manufacturing, may even benefit directly.

What should you do when the world feels unstable?

When the world feels uncertain, it’s tempting to do something quickly with your investments. But often, the best move is to pause, take a breath, and remember a few key principles:

• Don’t panic. Sharp volatility is a normal part of investing. We expect it. Making big financial decisions in the heat of the moment rarely ends well.
• Stick with your plan. Trying to jump in and out of the market based on feelings or headlines can seriously impact your long-term returns.
• Spread your risk. A well-diversified portfolio is like a shock absorber. It won’t eliminate bumps in the road, but it makes permanent loss of capital highly unlikely.
• Look at the bigger picture. Markets have always had ups and downs. But over time, they’ve rewarded patience and discipline. Don’t let short-term noise drown out your long-term goals.

A final thought

In this case, our client didn’t pull out. He stayed invested. And when we spoke to him a year later, he was relieved to have made that decision. Not only did the market rebound, but he was also rewarded with a sense of confidence that he shouldn’t be influenced by outside noise.

The world will always have its moments of chaos. Markets will rise and fall. Headlines will come and go. But an investment strategy should be built to weather storms, not just the sunny days.