U.S. stock markets experienced a significant downturn Wednesday, with the Dow Jones Industrial Average falling approximately 693 points, or 1.3%. The S&P 500 and Nasdaq also saw declines of 0.7% and 0.5%, respectively, amid heightened tensions with Iran.

President Trump stated at a NATO summit in Ankara, Turkey, that the preliminary peace deal with Iran is "over," declaring, "I don’t want to deal with them anymore. They’re scum." He indicated that the U.S. had conducted "powerful" overnight strikes against Iran in response to the nation's attacks on three commercial ships near the Strait of Hormuz, which American officials deemed a violation of a recent memorandum of understanding. Trump added that the U.S. would "probably hit them hard again tonight."

The escalating geopolitical situation sent oil prices soaring, with Brent crude futures jumping 7.5% to $79.71 a barrel and West Texas Intermediate crude increasing 7.2% to $75.52 a barrel. The Strait of Hormuz is a critical maritime route, accounting for 20% of the world's oil.

The national average gasoline price, which had been hovering around $3.80 a gallon and fallen from wartime highs, could see upward pressure. Historically, there is a one- to two-week lag between oil market fluctuations and gasoline prices. The renewed tensions might prevent prices from falling below the $3 mark.

Market analysts noted the immediate impact of the geopolitical developments. Robert Edwards, chief investment officer of Edwards Asset Management, described the market movements as a "clear sign that geopolitical tensions remain front and center," but advised against immediate alarm. "This is the most noticeable escalation of Iran tensions since the ceasefire took hold almost one month ago, and the typical market playbook has commenced, with rising oil prices, rising bond yields and falling stock prices," Edwards said in a note. He added that any dips in stock prices in the coming weeks could present a "buying opportunity."

Energy stocks saw a rise, with companies like ConocoPhillips, Marathon Petroleum, Chevron, and Exxon Mobil experiencing share price increases. Conversely, technology stocks, particularly chipmakers such as Samsung, Intel, and AMD, continued their decline, reflecting investor concerns about a potential "AI bubble."