
Geopolitical shock has been driving financial markets since the US and Israel launched attacks on Iran at the end of February. Energy prices spiked, as did stock and bond market volatility, amid Iranian strikes on Israel and the oil-rich Gulf nations, and the de facto closing of the vital Strait of Hormuz to international shipping.
When headlines turn to war, concerns about economic disruption, energy supply and financial stability often come to the fore. History, however, suggests that the relationship between war and long-term equity performance is more nuanced than initial market moves might imply.
Don't worry about volatility in the markets.
Markets Tend to Stabilize Over Time
Looking across eight major conflicts over the past five decades, the S&P 500 was often volatile around the outbreak of hostilities. In several cases, markets fell in the initial days and weeks, reflecting uncertainty about the duration and potential economic spillover. Yet stocks frequently stabilized—and in many instances recovered—over longer horizons. On average, one year after the onset of conflict, the S&P 500 was up 7.0%, underscoring the market’s capacity to look through geopolitical shocks.
These historical observations come with some caveats. The sample size is small and each conflict unfolded within a unique macroeconomic and market backdrop. Some wars coincided with recessions or financial imbalances that amplified their impacts on asset prices. Others occurred during periods of economic resilience, allowing markets to absorb the shock. As a result, averages can mask meaningful dispersion in outcomes.
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