The utilities were already falling before Warsh opened his mouth

Fed chair Kevin Warsh gave his first Jackson Hole keynote at about 10am Eastern on Friday 28 August. He said this summer's inflation readings did not convince him that underlying trends had meaningfully improved, and that the bank had more work to do. Coverage read it as a signal that a rate rise is back on the table.

The tidy version of Friday is that a hawkish Fed chair hit the rate-sensitive corners of the market. Utilities are the classic example — steady cash flows, heavy debt loads, held by a lot of people as a bond substitute — and utilities were indeed the second-worst sector on Friday, down 1.03% on a market-capitalisation-weighted basis, with 29 of 31 names falling.

The problem with that version is the day before.

The turn was Thursday

On Wednesday the sector was up and only five names fell. On Thursday — a day before the speech, and a day the S&P itself rose 0.63% — thirty of thirty-one utilities fell. Friday was the second day of that, not the first.

Whatever repriced utilities happened on Thursday. Bond markets were already under pressure that session, with yields moving higher across the curve on a mix of fiscal-deficit concern and inflation data that would not come down; core PCE was reported steady at 3.3%, still above target. Warsh's Friday remarks are better read as confirming a move already underway than as starting one. Treasury yields did rise further after he spoke, with the two-year reaching its highest level since late July.

Only two utilities finished Friday higher: $ED, up 0.75%, and $AWK, up 1.18%.

Breadth alone would have misled us

It is tempting to point at "94% of utilities fell" as though the number itself were the signal. It is not, and this is worth saying plainly because it is the kind of statistic that gets quoted without being checked.

Utilities move as a bloc more or less constantly. Setting aside the two sessions under discussion here, the sector closed over the last thirty days with every single one of its 31 names down on two occasions (28 July and 21 August), and with more than 85% of them falling on three further days. A 94% down day in utilities is an ordinary event. What was informative on Friday was not the breadth but the date the direction changed — and that was Thursday.

The rest of the rate trade did not confirm

If Friday had been a clean repricing of interest-rate expectations, the other rate-sensitive corners should have moved with utilities. They mostly did not.

Real estate, the other classic rate-sensitive sector, fell less than half as much and had barely more decliners than advancers. Financials rose — consistent with the standard reading that banks do better when rates are higher for longer, though a 0.32% sector move on a mixed breadth reading is thin evidence for anything.

Technology was the worst sector of the day at −1.24%, but Friday's technology weakness had a large and well-documented cause of its own that had nothing to do with the Fed: the AI-hardware complex sold off hard two days after Nvidia's results. Reading Friday's tech move as a duration story would be a mistake.

What this leaves

A sector fell for two consecutive sessions. The first of those sessions preceded the event that most of Friday's coverage credits for the move, and the second sector that should have confirmed the story mostly didn't.

None of that makes the rates explanation wrong. Bond yields did rise, the inflation print was above target, and utilities are genuinely sensitive to both. It does mean the move started before the speech, which is a different claim from the one the headlines made — and it is the sort of thing that is obvious on a map of the whole index two days running, and invisible in a single day's summary.

Next week brings employment data, which on the current framing matters more than usual.