Investing

Keep calm and carry on – geopolitical effects on markets prove temporary

5 March 2026
5 minutes

At a glance

  • The latest attacks on Iran and its retaliatory strikes across the region led to a sell-off in global markets.
  • While still volatile, many assets have since rebounded off their recent lows.
  • History shows that stock markets recover after such shocks and the best outcome to maximise eventual returns is to remain invested.

The recent attacks on the Iranian leadership and subsequent retaliatory actions across the Middle East have caused widespread geopolitical volatility. Unsurprisingly, they have also left many investors wondering what actions they should now be considering.

This appears to be the start of an open-ended war in one of the most geopolitically sensitive areas of the globe. The availability of 24-hour news makes it easy to monitor, almost in real time, what is happening.

Despite this information flow, perhaps one of the only certainties is the uncertainty about what will happen. At the beginning of this week, investors 
responded to the attacks on Iran in a similar way to their response to Russia’s invasion of Ukraine four years earlier. Stock markets fell, while traditional “safe haven” assets such as the US dollar and US treasuries rose.


In this situation, Iran’s ability to control the Strait of Hormuz means it can influence the global economy. Approximately 20% of the world’s oil and 90% of the oil destined for Asian markets passes through the straits. Many investors are therefore understandably concerned about what restricted energy supplies will do to the global economy. 

Taking a breath – what market history shows us

Many investors will be feeling the stress and uncertainty associated with the current events. However, those tempted to reduce their holdings should remember that market history, led by the US, shows us that following geopolitical shocks, stock markets bounce back.

For example, in the days following Russia’s invasion of Ukraine, the US S&P 500 fell by more than 7%. During the first two weeks, oil prices rose by 40%. Natural gas prices climbed 180% according to the European Central Bank. Yet four years on, with the conflict still ongoing, both the US and European stock markets (the latter severely affected at the time by the halt to Russian energy supplies) remain within touching distance of their all-time highs. Meanwhile the oil price remains well below the levels of four years ago. This is despite the double-digit percentage price rise per barrel seen over the past week.

Likewise, many key global indices including the S&P 500, the FTSE 100 and China’s Shanghai Composite were off their recent lows.

The same is true of the Cboe Volatility Index, known as the “Fear index”. While this rose initially, l reflecting more concerns in the market, it too has subsequently eased. It is now well under the level associated with high levels of fear in the financial markets.  

The reaction in bond markets has been more nuanced. While initially the flight to safety pushed bond prices higher (and bond yields lower), concerns about the effects of higher energy prices on inflation led to a reversal of this position. US Treasury yields are now higher than they were just prior to the US action.

As Joe Wiggins, Investment Research Director at SJP points out, times of stress and uncertainty are the worst time to make investment decisions. This is because our instinct is to anticipate a worst-case scenario coming to pass. Selling out at these levels will often see investors missing out on the subsequent recovery. This is shown in the accompanying chart of the S&P 500’s performance during major market shocks. Over the longer term and in the majority of cases, the benchmark has rebounded within months of the start of the event.  

SJP Approved 05/03/2026