President Donald Trump early Thursday lashed out at "these fools" criticizing the memorandum of understanding between the U.S. and Iran, defending the agreement as markets rallied and oil prices fell following its announcement.

"These fools, who think I haven't been tough enough on Iran, when the Stock Market Just Hit A RECORD HIGH, and Oil prices are 'tumbling' down, are either jealous, bad people, or stupid. MAKE AMERICA GREAT AGAIN!!!" Trump posted on Truth Social.

Trump's comments came hours after he formally signed the memorandum alongside Iranian President Masoud Pezeshkian, launching a 60-day negotiating period aimed at converting the framework into a broader agreement covering Iran's nuclear program, sanctions relief, regional security issues, and enforcement mechanisms.

According to Newsmax reporting, the memorandum is intended to halt further escalation while Washington and Tehran pursue a more comprehensive settlement.

U.S. officials have described the document as a preliminary framework rather than a final peace treaty.

The agreement reportedly includes an immediate cessation of hostilities and opens negotiations on limits to Iran's uranium enrichment activities and its stockpile of enriched uranium.

Newsmax reported that Iran has, in principle, agreed to curb enrichment efforts and expand cooperation with inspectors from the International Atomic Energy Agency as part of a verification-based process tied to any future sanctions relief.

Trump signed the accord while attending events related to the G7 summit in France, where French President Emmanuel Macron hosted world leaders at the Palace of Versailles.

Agence France-Presse reported that Macron applauded the signing, calling it a step that "allows for peace" and creates a pathway to further negotiations.

Markets reacted positively to the development.

Oil prices fell sharply Thursday, extending losses seen after news of the agreement first emerged, amid expectations that commercial shipping through the Strait of Hormuz could normalize and reduce concerns about global energy supplies.

Maritime de-escalation and the reopening of the strategic waterway are tied to broader compliance measures and reciprocal reductions in military activity in the Gulf.

Any sanctions relief, according to U.S. officials and statements from Trump and Vice President JD Vance, would remain contingent on verified Iranian compliance.

The White House has not confirmed all details reported by wire services, particularly provisions involving sanctions relief and economic measures.

AFP contributed to this report.