09:00 AM EDT, 04/07/2026 (MT Newswires) -- US equity futures were down ahead of Tuesday's opening bell as President Donald Trump's deadline for Iran to open the Strait of Hormuz approached.

Dow Jones Industrial Average futures were down 0.4%, S&P 500 futures were 0.5% lower, and Nasdaq futures were down 0.6%.

On Monday, Trump reiterated his warning that the US would strike Iran's power plants and bridges if the strait was not reopened by 8 pm ET Tuesday.

"We're giving them till tomorrow, 8 o'clock Eastern time, and after that, they're going to have no bridges," Trump told reporters at the White House Monday.

Oil prices were higher, with front-month global benchmark North Sea Brent crude up 0.7% at $110.57 per barrel and US West Texas Intermediate crude 2.7% higher at $115.34 per barrel.

In other world markets, Japan's Nikkei finished 0.03% higher, China's Shanghai Composite ended 0.3% higher, while the Hong Kong market was closed for holiday. The UK's FTSE 100 was down 0.04%, and Germany's DAX index was 0.3% lower in Europe's early afternoon session.

In equities, shares of Humana (HUM) and CVS Health ( CVS ) were up 11% and 8%, respectively, after the Centers for Medicare & Medicaid Services announced a larger-than-expected increase to Medicare Advantage payments for 2027.

On the losing side, Mach Natural Resources ( MNR ) stock was down 11% after the company said late Monday a public offering of 9 million common units by certain selling investors had been priced at $13.05 apiece.