Looking across more than a century of international conflicts and their equity market impacts, several consistent patterns emerge. These patterns are not iron laws — each conflict has unique characteristics — but they provide a useful framework for understanding how markets process geopolitical risk.
Across every conflict studied, the period of greatest market decline occurs before the conflict begins or reaches its peak, not during the fighting itself:
| Conflict | Pre-conflict decline | Post-onset recovery |
|---|---|---|
| WWI (1914) | Exchanges closed for months before reopening lower | Markets rallied once war production began |
| WWII (1939–1942) | Dow fell 40% from 1937 peak through early war fears | 130% rally from April 1942 low |
| Gulf War (1990–1991) | S&P 500 fell 20% during Aug–Oct 1990 build-up | 20% rally once air campaign began |
| Iraq War (2003) | S&P 500 fell to 5-year low before invasion | 15% gain in three months after invasion |
| Russia-Ukraine (2022) | S&P 500 fell 10% in Jan–Feb build-up | Partial recovery after initial shock |
The lesson is consistent: markets can handle bad news; they cannot handle not knowing. Once the scope of a conflict is understood, prices adjust and often begin recovering even while fighting continues.
Every major conflict produces a remarkably similar pattern of sector winners and losers:
When conflicts resolve, the rotation typically reverses: defence stocks underperform as the "peace dividend" is priced in, while consumer and travel stocks recover.
Equity markets have historically recovered from conflict-driven sell-offs faster than most investors expect:
| Event | Decline | Time to Recovery |
|---|---|---|
| WWI outbreak (1914) | Exchange closures | US market at new highs by 1916 |
| Pearl Harbor (1941) | Initial sell-off | Recovery began April 1942 |
| Korean War (1950) | 12% decline | Recovered within months |
| Cuban Missile Crisis (1962) | 7% decline | Recovered within weeks |
| Gulf War invasion (1990) | 20% decline | Recovered by March 1991 |
| 9/11 attacks (2001) | 14% decline (first week) | Pre-attack level recovered within a month |
| Russia-Ukraine invasion (2022) | 10% decline | Recovery began within months (though complicated by rate hikes) |
The median recovery time from conflict-onset to pre-conflict market levels is approximately 3–6 months, remarkably fast given the severity of the events.
In every conflict, government economic policy responses have had larger market impacts than the military events themselves:
As global financial integration has increased, conflicts have had wider geographic market impacts:
The Russia-Ukraine war may represent a turning point: rather than further integrating markets, it has prompted investors and governments to reconsider whether deep financial interconnection with geopolitical rivals creates unacceptable vulnerability.
Every major conflict has left a permanent mark on the structure of financial markets:
| Conflict | Structural Legacy |
|---|---|
| WWI | End of gold standard, New York replaces London, birth of capital controls |
| WWII | Bretton Woods, permanent defence sector, SEC-regulated markets |
| Cold War | Defence as blue-chip sector, oil-geopolitics linkage, emerging markets |
| Gulf War | "Buy the invasion" trading pattern, 24-hour news cycle |
| War on Terror | Cybersecurity sector, permanent surveillance economy |
| Russia-Ukraine | Energy transition acceleration, sanctions as market risk, friend-shoring |
Based on these patterns, several practical principles emerge:
Part of the Conflicts and Equity Markets article cluster.