Geopolitical Crises Have Rocked the S&P 500 Before. Every Single Time, Patient Investors Came Out Ahead.

The war with Iran is threatening the stock market. Here's why smart investors won't sell.

Mar. 15, 2026 at 9:35am

The war in Iran is taking a toll on the U.S. economy, with gas prices surging 17% and crude oil prices rising above $100/barrel. The S&P 500 is down 3.1% over the past month and 3.8% from its January high, raising recession concerns. However, the research shows that while stocks suffer during the early part of a recession, they have always recovered and gone on to reach even greater heights, regardless of geopolitical crises.

Why it matters

This case highlights the importance of long-term investing and not panicking during times of geopolitical turmoil. Even major events like the 9/11 attacks and the subsequent wars in Iraq and Afghanistan did not prevent the markets from eventually recovering and continuing to grow over the long term.

The details

The S&P 500 has dropped 3.1% over the past month and 3.8% from its January high due to the war in Iran, which has caused gas prices to surge 17% and crude oil prices to rise above $100/barrel. An economic model by the New York Fed showed an 18.7% chance of a recession by January 2027 even before the war began. However, research by The Motley Fool shows that while stocks suffer during the early part of a recession, they have always recovered and gone on to reach even greater heights, regardless of geopolitical crises. For example, during the COVID-19 recession, both the S&P 500 and Nasdaq Composite dropped sharply but had fully recovered by the end of July 2020. Similarly, while the 9/11 attacks sent stocks lower, they had rebounded somewhat by November 2001, and both the Nasdaq and S&P 500 went on to long-term success despite the ongoing wars in Iraq and Afghanistan.

  • In February, an economic model by the New York Fed showed an 18.7% chance of a recession by January 2027, and that was before the war even began.
  • During the COVID-19 recession of February to April 2020, the S&P 500 eventually tumbled 33.9% from its pre-recession high and the Nasdaq fell 30.3%, but both indexes had fully recovered by the end of July 2020.
  • After the 9/11 attacks in September 2001, the Nasdaq bottomed out in 2002, while the S&P 500 didn't hit its lows until early 2023. However, both went on to long-term success, in spite of the ongoing wars in Iraq and Afghanistan that followed 9/11.

The players

S&P 500 Index

A stock market index that measures the performance of 500 large companies listed on stock exchanges in the United States.

Nasdaq Composite

A stock market index that includes over 3,000 stocks listed on the Nasdaq stock exchange.

The Motley Fool

A multimedia financial-services company that provides financial advice and investment information to individual investors.

New York Fed

The Federal Reserve Bank of New York, one of the 12 regional reserve banks of the Federal Reserve System.

President Trump

The 45th president of the United States, who served from 2017 to 2021.

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The takeaway

This case highlights the importance of long-term investing and not panicking during times of geopolitical turmoil. Even major events like the 9/11 attacks and the subsequent wars in Iraq and Afghanistan did not prevent the markets from eventually recovering and continuing to grow over the long term, proving that patient investors who stay the course will come out ahead.