Rate hikes for an inflation the Fed cannot fix

Stocks fell for a fourth straight day on September 10th as benchmark crude topped $100 a barrel and the yield on ten-year Treasuries struck 4.90%, a multi-year high. The S&P 500 closed at 7,591.70. By the afternoon the CME's FedWatch tool put the odds of a quarter-point rate rise at the Federal Reserve's meeting next week at roughly 65%. The last time the Fed lifted rates was July 2023. A market that spent years assuming the next move was down is now pricing in the reverse, and the cause is not a roaring economy but a war.

The problem is that this particular bout of inflation is the wrong kind for a central bank to fight with rates. The pressure comes from energy: an escalating American conflict with Iran has battered shipping through the Strait of Hormuz, and Saudi Arabia is producing oil at its lowest level since 1990. Goldman Sachs, a bank, warns that further attacks in the Gulf and Red Sea could push Brent crude toward $120 a barrel. Rate rises work by damping demand — they make borrowing costlier so that spending, and prices, cool. They cannot drill a barrel of oil, reopen a strait, or end a war. Tightening against a supply shock is rather like fighting a fire by shutting off the water because water is getting expensive.

Why, then, are markets bracing for a hike? Because the Fed's new chairman says he is ready to deliver one. Kevin Warsh, installed in May by a president who wanted lower rates, has spent his first months insisting on the 2% inflation target. At Jackson Hole in late August he read the outlook more hawkishly than at his first meeting, and on September 3rd he warned that rates may need to rise if underlying inflation fails to return to target. The committee held in July, in a 9-3 vote, keeping the federal-funds rate at 3.50-3.75%; the three dissenters wanted an increase. Markets are probing whether Mr Warsh means what he says.

The palpitations, in other words, are a wager on credibility, not a bet on the data. The gulf between market pricing and the profession is striking. In a Reuters poll a week before the meeting, about seven in ten economists (65 of 93) expected the Fed to sit on its hands in September — down from nine in ten a month earlier, but still a majority — even as markets price in two hikes by March 2027. Inflation has run above the 2% target for more than five years and, most economists reckon, will not get back to it before 2028. Mr Warsh's refusal to guide markets, a deliberate break from convention, leaves investors to guess. Their guess is that a hawkish chairman staring at $100 oil will tighten.

Politics makes the test more pointed. A president who hand-picked Mr Warsh has threatened trade restrictions unless the Fed cuts rates, and has mused that oil prices may not fall until after the midterms. The hawk he chose is heading the other way. At such a moment the meaningful question is not whether Mr Warsh defies Mr Trump, but whether an independent Fed defends its target at the cost of demand the country is not in danger of losing. A hike born of an oil shock is meant to keep inflation expectations anchored; it is not the start of a long tightening cycle. If the war eases, so does the case for the second hike.

For the investor, two channels are doing the damage, and they are easy to confuse. The first is the discount rate. When long-term yields climb toward 5%, the value of profits earned far in the future falls most, which is why growth and technology shares, and the small-caps whose cash flows are smallest today, have been hit hardest; energy and healthcare were the only sectors up over the past month. The second is cash flow: higher energy costs squeeze consumers and the discretionary firms that sell to them, while producers capture the windfall. A drift down for the broad index, with energy and defensives up, is the signature of an inflation scare driven by supply — not the broad-based retreat that a genuine demand meltdown would bring.

What would turn a scare into a cycle is Friday's consumer-price report for August, the last big data point before the meeting; economists polled by Reuters expect a 0.4% monthly headline rise and watch the core reading for signs the energy shock is seeping into everything else. A hot core print converts fear into policy. A benign one would let a chairman who refuses to guide markets quietly keep his powder dry.

None of this tells the novice investor to buy or sell anything. It does offer a way to read the tape. A rate hike delivered next week would be, at bottom, a statement about expectations — that a central bank will raise rates into a war it cannot win rather than let a five-year overshoot become permanent. The market's palpitations are the price of watching an institution defend its reputation with an instrument that cannot touch the fire. The investor's task is to tell that act of defence apart from a genuine tightening cycle, and to remember that oil, not the Fed, is the variable that will decide which one this is.