It took five minutes. From the moment Trump’s Truth Social post appeared announcing a five-day postponement of strikes on Iran’s power plants, markets moved with a violence that matched the geopolitics. Brent crude futures plunged 14% in the initial rush before settling down roughly 11% at $99.94 — the first time the global benchmark had traded below $100 since 9 March. West Texas Intermediate crashed more than 10% to $88.13.

Equities surged in the opposite direction. The Dow Jones Industrial Average jumped approximately 1,000 points. The S&P 500 gained 2%, closing at 6,581. The Nasdaq rose 2.3%. European futures, which had been pricing in another week of energy chaos, spiked higher in after-hours trading. Gold fell. Treasury yields eased. Every risk asset on the planet repriced simultaneously on a single social media post from one man.

The Five-Minute Rally

Bloomberg described it as a “wild five-minute rally” that “sends a clear message to Wall Street.” The message is this: the entire global financial system is now hostage to the moods and postings of a president conducting foreign policy via social media. The rally was not driven by fundamentals. No oil has started flowing through the Strait of Hormuz. No peace deal has been signed. No ceasefire has been agreed. What happened was that one man said he was postponing a threat he had made 48 hours earlier, and trillions of dollars in asset values moved on the strength of that statement alone.

The fragility of this is breathtaking. If Trump’s five-day window closes without a deal — and Iran’s denial of any negotiations suggests it might — every dollar gained today will be lost in a reversal that could be even sharper. Markets that rally on hope crash on disappointment, and the hope being priced in today rests on the thinnest possible foundation: the word of a president whose relationship with truth is, to put it diplomatically, complicated.

The Energy Market

For energy traders, Monday was a lesson in the difference between price and supply. Oil prices fell because traders believe the war might end. Oil supply did not increase by a single barrel. The Strait of Hormuz remains physically blockaded. Iranian mines are still in the water. The tanker fleets that normally transit the strait are still rerouted around the Cape of Good Hope, adding weeks and billions of dollars to shipping costs. If the five-day window closes without Hormuz reopening, the snapback in crude will be vicious.

European gas futures told a more cautious story. While they fell alongside crude, the decline was smaller and the recovery faster, reflecting the market’s understanding that LNG supply disruptions from Qatar are structural and will not be resolved by a social media post. European countries that depend on Gulf gas — which is most of them — are still facing a winter supply crunch that no amount of diplomatic optimism can fix.

The UK Dimension

Britain’s government borrowing costs surged to their highest level since the 2008 financial crisis on Monday, even as equities rallied. The divergence is telling. Bond markets are not pricing in peace. They are pricing in an economy that has been structurally damaged by a month of energy chaos, with inflation heading back toward 5%, growth stalling and the government about to spend billions on defence it cannot afford. The gilt market is sending a message that equity traders are ignoring: this crisis has already done lasting damage, regardless of what happens in the next five days.

Monday’s market moves were spectacular. They were also, in all probability, premature. The war is not over. The strait is not open. And the man whose word moved trillions of dollars today has a track record of making promises he does not keep. Trade accordingly.