Adam: 4.1%.
Adam: That's the Personal Consumption Expenditures reading for May 2026 — out of the Bureau of Economic Analysis, published by the Commerce Department. The Fed's preferred inflation measure. Their target is 2%. 4.1 is where it is.
Adam: Highest since April 2023.
Adam: Now — before we go anywhere else — what you're gonna hear is that an oil shock explains this. The Strait of Hormuz closure, the Iran war, Brent crude running from roughly $61 to roughly $118 a barrel across Q1 2026 after coordinated U.S. and Israeli strikes on February 28th. That's real. That transmission — crude into fuel into transport into every downstream price — that's exactly what happened.
Adam: But core PCE — food and energy stripped out — hit 3.4% in May. Highest since October 2023.
Adam: So the energy story doesn't explain that. Or — actually, it does, just more slowly. Oil doesn't stay in the fuel tank. It moves into the cost of every service, every shipped good, every healthcare appointment that arrived by road.
Adam: March: 3.5%. April: 3.8%. May: 4.1%. Each month wider than the one before.
Adam: This is what a shock looks like when it spreads — not a spike, a staircase. And we're still climbing.
Adam: Here's what that staircase actually costs — not in percentage points, in monthly payments.
Adam: The Fed had spent months signaling cuts. Markets had priced them in. Early 2026, the expectation was borrowing gets cheaper — mortgages ease, business loans ease, the whole cost of carrying debt comes down a little. That was the plan.
Adam: The PCE report killed it.
Adam: What markets repriced to — sharply, not gradually — was the possibility of Federal Reserve rate HIKES. A full reversal. And mortgage rates moved with it. If you're sitting right now trying to buy a house, trying to refinance, trying to carry a business loan through Q3 — you are paying for a war in the Strait of Hormuz.
Adam: That's the transmission. It doesn't stay geopolitical.
Adam: Then Reuters reported renewed U.S.-Iran strikes on June 28th. Oil climbed again. Gold slipped — because when Fed hike bets intensify, gold loses its appeal. The Bank for International Settlements had already warned that AI-boom debt and global economic fragilities were compounding this exact kind of environment. The Dallas Fed — researchers Kilian, Plante, Richter, and Zhou — published Working Paper 2609 in April, running DSGE model scenarios on precisely this inflation pathway. The institutional alarm bells were ringing before May's number even printed.
Adam: And then Bloomberg reported that the Trump administration was considering a U-turn on Iran sanctions. Decades of sanctions policy — potentially unwound. That sounds like relief. It isn't. It introduces a new variable into an oil market that's already broken, and broken markets don't heal cleanly from uncertainty.
Adam: The staircase doesn't stop just because someone floats a deal. We're still climbing.
Adam: The number to watch is 3.4%.
Adam: Core PCE. That's the one. Not headline — core. Food and energy stripped out. If that number stays elevated into September, the Fed has cover to hike even if oil has already come back down. Even if Brent crude retreats from $118. Even if the Strait of Hormuz reopens. The energy shock can end and the inflation problem doesn't go with it. That's the embedded version. That's the one that forces the Fed's hand.
Adam: Experts cited by the LA Times made this point clearly — the economic costs of this Iran war, including inflation, linger well beyond the conflict's end. And that's not speculation. That's the historical pattern of what happens when an oil shock has time to move through wages, through service prices, through the whole downstream structure.
Adam: And here's the honest tension. Bond markets have historically overestimated how long external energy shocks persist. They price in the fear and then the fear doesn't last as long as the pricing did. That's a real counterargument — one worth holding. The Dallas Fed paper, Working Paper 2609, explicitly notes its DSGE scenarios don't reflect official Fed policy. That's their caveat, not mine. There is genuine uncertainty about how far this goes.
Adam: But uncertain duration is not the same as no problem.
Adam: The September Fed meeting is the specific decision point. If core PCE holds above 3% heading into it — doesn't have to climb, just hold — a rate hike is a real outcome. Kevin Warsh has been referenced in the context of potential Fed course changes under new leadership. That's another variable. A different Fed chair carries different instincts about when to move. And then there's Trump's sanctions reversal — if it materializes, oil supply could ease. But a policy U-turn of that magnitude introduces unpredictability into an oil market that's already broken. Easier supply doesn't AUTOMATICALLY mean lower prices when the market doesn't trust the policy holding.
Adam: Watch the core number. Watch September. The staircase either stops climbing — or it doesn't.
Adam: The bet the Fed is making right now — if you strip it down — is that 4.1% headline and 3.4% core both come down on their own before September forces a decision. That the oil shock fades, that the downstream pricing cools, that the staircase stops. That's the bet. And if it's wrong — if core PCE holds, if September arrives and the number hasn't moved — the Fed hikes into an economy that's already slowing. That's the mechanism. That's exactly how you manufacture a recession. Not through malice. Through a forced hand.
Adam: Two percent is the target. 4.1 is where it is. That gap is not a rounding error.
