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President Donald Trump issued the threat ahead of this week's G7 summit in Évian-les-Bains, France.
The agreement came after more than three months of stop-start negotiations and bouts of fighting since late February, roiling global energy and commodities markets.
The deal follows weeks of mixed messaging from both Washington and Tehran on the trajectory of the conflict.
Javice founded a startup called Frank that JPMorgan acquired in 2021 for $175 million.
The leaders also discussed Iran, with Trump saying a U.S. agreement with Tehran was close.
The president has sought to tie Sunday's event to larger, months-long celebrations of the 250th anniversary of the signing of the Declaration of Independence.
An initial deal to end the war and open the Strait of Hormuz was expected to be signed this week.
The Iran war has drawn the world's focus, but the G7 is also likely to address Russia's war against Ukraine, which continues to rage in eastern Europe.
President Donald Trump posted on Truth Social that a deal to end the war with Iran will be signed on Sunday.
Trump is scheduled to travel to Evian, France, for the G7 summit early Monday after attending Sunday's mixed-martial-arts event at the White House.
The Trump administration must also provide a weekly status report describing the progress it's made with these changes, the judge wrote.
Trump on Friday said U.S. forces carried out a strike that killed Hector Rusthenford Guerrero Flores, the leader of Venezuelan gang Tren de Aragua.
Dozens of people spent hours on Friday on the plaza in front of the Kennedy Center, occasionally cheering as they broke into chants of "take it down."
Switzerland votes on a population cap that could tighten immigration and put its EU free-movement agreement under pressure.
Kevin Warsh's two immediate predecessors preferred to be called the Fed "chair." For Warsh, it's "chairman" of the Federal Reserve.
Republican Rep. Lisa McClain’s husband bought up to $250,000 in Elon Musk’s xAI before it was folded into SpaceX ahead of its IPO.
President Donald Trump earlier wrote on Truth Social that public reporting about the deal has "NOTHING to do with the terms that were agreed to, in writing."
A judge gave Acting Attorney General Todd Blanche and Treasury Secretary Scott Bessent a week to submit a sworn declaration the DOJ fund was not going forward.
Kevin Warsh will hold his first Fed meeting, giving markets the first public look at how he'll communicate as chair of the Federal Reserve.