On June 12, 2026, the United States and Iran said they were close to ending their military conflict, according to Reuters. One problem: the Strait of Hormuz, a crucial sea passage that one-fifth of the world's oil travels through, still poses security risks.

Why does this matter to your money? A peace deal would likely lower oil prices. Cheaper oil means lower gas prices at the pump and lower costs for plastic, electricity, and shipping. That's generally good. But even after a peace deal, shipping companies and oil traders may keep charging extra—a "risk premium"—to account for potential future trouble in the strait. That's like paying for insurance even after the threat has supposedly ended. So don't expect energy costs to drop overnight.

There's another wrinkle: the Federal Reserve just hired a new boss. Kevin Warsh became Fed Chairman on May 22, 2026, per the Federal Reserve. He replaced Jerome Powell, who was leading the Fed temporarily.

The Fed's job is to manage inflation and keep the job market healthy by adjusting interest rates. Here's the puzzle the new chairman faces: if the Iran deal works, oil gets cheaper, which pushes inflation down. That sounds good. But at the same time, a peace deal makes investors feel safer and more willing to borrow and spend. When people borrow more and spend more, prices can go up, which pushes inflation back up. So the ceasefire creates two opposite effects working against each other. Neither one is powerful enough to force the Fed's next move, which leaves room for disagreement on the committee about which direction to go.

Warsh has a track record worth paying attention to. He worked at the Federal Reserve from 2006 to 2011, including during the financial crisis. Back then, he criticized the Fed's practice of buying massive amounts of bonds and of signaling in advance what rates would be in the future. Investors tend to see him as more serious about controlling inflation than Powell was. However, people sometimes make different choices when they're in charge than they did when they were critics on the sidelines—so Warsh as chairman could surprise people.

What happens next depends partly on timing. If Iran signs a formal peace deal before the Fed's next meeting, Warsh and his committee will have fresh evidence that prices are heading lower. If the deal stays "close" but not done—diplomatic-speak that can mean a few days or several months—then energy prices stay risky, and the Fed hawks have cover to sit tight on interest rates.

But here's the thing that will move markets fastest: not the ceasefire itself, but what Warsh says. He had been chairman for fewer than four weeks by June 12. His first major speech or policy statement will get intense scrutiny because his predecessor was only acting temporarily, and that transition created uncertainty about what the Fed really wanted to do.

The bottom line: a peace deal with Iran would be a real change in global risk. Cheaper oil, safer shipping, more available money for business in the Middle East—all of those are genuinely helpful. But they don't flip a switch instantly. The Fed, led by a new chairman still proving what he stands for, now has to handle a situation where lower inflation and looser borrowing conditions happen at the same time. That makes it harder for the Fed to send clear signals about where interest rates are going.

What Warsh decides to say and when he says it will move interest rates faster than any peace agreement.