Stock market today: Dow, S&P 500, Nasdaq slide after Trump orders Hormuz blockade against Iran

US stocks traded lower on Monday after President Trump ordered a US blockade of the Strait of Hormuz following the collapse of US-Iran negotiations.
The Dow Jones Industrial Average (^DJI) fell roughly 0.5%, while the S&P 500 (^GSPC) and tech-heavy Nasdaq Composite (^IXIC) dropped by 0.2% as a surge in oil prices revived concerns about inflationary pressure and potential drag on global growth.
Trump’s move to block all maritime traffic through the Strait of Hormuz escalated already high tensions in the Middle East. That has piled on even more risk for markets whose hopes for a cessation in hostilities were dented by the breakdown in negotiations in Islamabad.
“Effective immediately, the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz,” Trump wrote on Truth Social. The blockade is scheduled to start at 10 a.m. ET on Monday.
Iran responded by vowing to target all Persian Gulf ports if its own energy hubs are threatened, calling the US move “an act of piracy.”
Oil prices jumped back above $100 on the threat to global energy flows, with the global benchmark Brent crude (BZ=F) rising 7% to $101 a barrel, while the US counterpart, West Texas Intermediate futures (CL=F), were up over 7% to top $103 per barrel.
Attention now turns to the start of first quarter earnings season. Goldman Sachs (GS) kicked off bank earnings on Monday with strong profits. Results from Bank of America (BAC), Wells Fargo (WFC), Citigroup (C), JPMorgan Chase (JPM), and Morgan Stanley (MS) will follow as the week progresses.
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