Global Markets Tumble Amid U.S.-Iran Tensions and Interest Rate Hike Bets

Global markets were impacted by escalated tensions between the U.S. and Iran, as well as expectations of an interest rate hike by the European Central Bank. The stock market suffered its worst day of the year as a result of U.S.-Iran hostilities. The exact details of U.S. actions in Iran and Oracle's AI spending plans remain unclear.

The sudden escalation of U.S.-Iran hostilities has sent shockwaves through global markets. U.S. Central Command conducted strikes against multiple targets in Iran near the Strait of Hormuz, with President Donald Trump signaling further action was possible . The move triggered a sharp broad-market sell-off on June 10: the Dow Jones Industrial Average fell roughly 953 points (about 1.87%), the S&P 500 shed 1.62%, and the Nasdaq dropped roughly 1.98% in one of the worst single-session declines of 2026. Iran retaliated with missile and drone attacks on U.S. bases in Jordan, Kuwait, and Bahrain, deepening risk-off sentiment across equity and credit markets.

Compounding the pressure, the U.S. Consumer Price Index rose to its highest level in three years, a move widely attributed to the oil-price spike triggered by conflict near the Strait of Hormuz. Against that backdrop, the European Central Bank raised its deposit facility rate by 25 basis points to 2.25% on June 11 -- its first rate increase since 2023 -- as eurozone inflation hit 3.2% in May, driven by a nearly 11% surge in energy prices. ECB President Lagarde signaled the bank's priority remains anchoring inflation at the 2% target, and markets are pricing in at least one additional hike later this year.

The Oracle AI spending angle remained a secondary point of market attention, with limited visibility on capital allocation timelines. Traders will continue to monitor U.S.-Iran diplomatic signals, Strait of Hormuz shipping conditions, and central bank guidance to gauge the durability of the sell-off.