Market Reaction and Economic Implications
The 10-day extension of the Iran talks deadline announced by President Donald Trump on March 23, 2026, led to a significant market sell-off. The S&P 500 closed down 1.7% to a six-month low, while the Nasdaq Composite dropped 2.4%, entering a technical correction. Brent crude and WTI crude prices surged 5.7% and 4.6%, respectively, due to fears of inflationary pressure and a potential delay in Federal Reserve rate cuts.
Short-Term Impact on U.S. GDP
The short-term effects of the extension are expected to slow quarterly real-GDP growth by 0.5-1.0 percentage points in Q2-2026, with an annualized impact of -0.7% to -1.2% on real GDP. This is attributed to higher energy costs, reduced consumer spending, and a financial-market wealth effect.
Long-Term Impact on U.S. GDP
In the long term, if the conflict remains unresolved, the cumulative drag on U.S. real GDP over the 2027-2032 horizon is estimated to be -0.4% to -0.7%. However, if a peace agreement is reached within the 10-day extension, the drag could be much smaller, limiting the long-run impact to -0.1% to -0.2%.