Crude oil jumped 3.2% on Monday after Donald Trump announced he would personally broker peace between the United States and Iran — two nations that have spent the last 47 years treating each other like divorced parents forced to share custody of the Strait of Hormuz.

This is where we are now. Oil markets, which theoretically respond to actual supply disruptions, geopolitical violence, and the physics of moving petroleum across oceans, instead gyrate wildly on the premise that a former real estate developer might convince two governments to stop hating each other because he asked nicely.

Let’s be clear about what happened here. Trump said, on Saturday, that a deal would include “the reopening of the Strait of Hormuz, without giving further details.” That is the entire substance. No framework. No timeline. No indication that Iran or anyone else involved actually wants this. Just the word of a man promising to fix something that requires the cooperation of multiple countries with genuinely incompatible interests, delivered with the confidence of someone who once promised to make Mexico pay for a wall.

And the market responded by assuming this would happen.

This matters to you if you own a car, heat your home, or buy anything that was transported by truck — so basically everything. Oil prices ripple through the economy like someone threw a rock into a pond, except the rock is hope and the pond is your grocery bill. When crude rises, energy stocks rise, which makes investors feel wealthier, which makes them spend more, which pushes inflation up, which makes the Federal Reserve think about raising interest rates again, which makes your mortgage more expensive. All because a guy promised to have a chat.

The absurdity here is not that markets react to geopolitical risk. That is legitimate. Iran has spent decades threatening to close the Strait of Hormuz — the waterway through which roughly 20% of the world’s oil passes. If Iran actually did that, oil would spike to $150 a barrel and we would all know why. That is a real threat with real consequences.

But this is not a real threat being resolved. This is a promise to maybe try to resolve it. The US and Iran have been “negotiating” in various forms since 1979. They had a nuclear deal (the JCPOA) that Trump himself withdrew from in 2018, which is how we ended up here in the first place. The idea that Trump will succeed where decades of diplomats failed, armed only with his personality and a vague promise about straits, is the kind of assumption that usually precedes a market correction.

What makes this genuinely funny is that oil traders are essentially playing a game of financial telephone with themselves. Trump says something optimistic. News outlets report it. Traders see the headlines. Traders assume other traders believe the headlines. Traders buy. Prices rise. Nobody actually believes Iran and the US are about to become friends — but everyone believes that everyone else believes it, so it becomes self-fulfilling. Until it doesn’t.

This is how markets work when they are not grounded in reality. And markets are less grounded in reality than ever, because information travels at light speed now, sentiment can be measured in real time, and a tweet can move billions of dollars before anyone has actually thought about whether the tweet meant anything.

So what should you do with this information? If you are a regular person with a 401(k) and a gas tank, you do nothing. Oil prices will fluctuate. Some of that will be Trump’s fault, some will be OPEC’s fault, some will be actual supply issues, and some will just be noise. You cannot time this. Do not try.

If you are someone who actually cares about energy prices — say, you run a logistics company or you are sensitive to inflation — you should probably assume that crude will eventually settle back closer to where it was before this announcement, because the fundamental reason to believe a US-Iran peace deal will happen remains approximately zero. Trump has made optimistic proclamations about many things. Some happened. Most did not. The market is pricing in the optimistic scenario. Reality tends to disappoint.

The real lesson here is that we have built a financial system where the mere hope of something can move prices before the something has any chance of actually occurring. That is not a market responding to information. That is a casino where the roulette wheel spins before anyone has even placed their bets.

But the oil did go up, so somebody made money on Monday. And that is the only thing that actually matters in markets — not whether the news was real, but whether you bet correctly on what other people would think about the news. That is not economics. That is psychology. That is why oil prices move on the promise of high school diplomacy.

Welcome to 2026.