US-Iran War Triggers Global Market Volatility and Oil Spikes

A military conflict between the United States and Iran, which began on February 28, 2026, has destabilized global energy and financial markets. The war escalated with the closure of the Strait of Hormuz and Iranian drone strikes on the Dubai International Finance Center. By March 11, the Iranian military declared financial centers valid war targets, forcing banks including HSBC, Citigroup, and Standard Chartered to evacuate or restrict staff in the United Arab Emirates.

Market volatility intensified through mid-March, culminating in the assassination of Iran's top leadership on March 17. The Morningstar US Market Index dipped 4.2%, erasing trillions in value. While materials and financial services sectors fell by up to 10%, Brent crude oil prices climbed past $115, boosting energy stocks and defense contractors such as Lockheed Martin and Northrop Grumman. Corporate bond credit spreads also widened, with the gap between BBB-rated bonds and Treasuries reaching 108 basis points.

Financial strategists advised investors to remain calm. Scott Helfstein of Global X warned against exiting the market to avoid missing a recovery, while Ryan Detrick of Carson Group described the dip as an opportunity to buy quality companies at a discount. Christine Benz of Morningstar recommended automating investment contributions to minimize the impact of ongoing volatility.