Trump’s ‘economic D-Day’ claims first victim: Not Iran, but US markets

What the report says

Al Jazeera reports that President Donald Trump’s latest threat of “economic warfare” against Iran is already being felt less in Tehran than in global markets. The article says the US and Israel’s war on Iran has disrupted shipping through the Strait of Hormuz, a key route for Gulf oil exports, helping push energy prices higher and shake investor confidence. The piece was published on Aug. 21, 2026, and says the market reaction came after Trump warned on Truth Social that countries helping Iran could face severe economic consequences.

According to the report, US crude oil rose to about $86.70 a barrel on Thursday, while Brent crude reached nearly $93 a barrel. US stock indexes fell sharply, with the Dow Jones Industrial Average dropping 703.84 points and the S&P 500 ending lower as well. Al Jazeera also notes that the 30-year US Treasury yield moved above 5.25 percent, which it presents as a sign investors were demanding more return to hold US debt.

The article says the Trump administration responded by increasing Treasury buybacks of long-dated debt, but that did not immediately steady markets. It adds that the conflict is adding to inflation pressures in the United States at a time when total US debt has passed $40 trillion, and ahead of crucial midterm elections. More broadly, the report describes the war’s spillover effects on Gulf and East Asian economies, along with the political challenge facing Trump as the conflict continues and peace talks remain uncertain.