Federal Reserve (the Fed) Chair Kevin Warsh used his closely watched Jackson Hole speech last week to deliver an unusual message to financial markets: stop expecting the Fed to tell you what it plans to do next.
Warsh criticised the central bank's longstanding practice of providing extensive 'forward guidance' on future interest-rate decisions, arguing that monetary policy should instead respond to economic conditions as they evolve. However, while he deliberately avoided signalling the Fed's next move, investors found plenty of clues in what he did say.
Markets certainly interpreted the speech as hawkish. Expectations for a 25-basis-point interest-rate increase jumped sharply, with futures markets pricing the probability of a hike at around 60%, compared with approximately 35% before Warsh spoke.
At the heart of his message was inflation.
Despite recent consumer and PCE inflation readings coming in better than expected, Warsh cautioned against declaring victory too early.
"While this summer's PCE and CPI readings were better than expected, they do not tell me that underlying trends have meaningfully improved," he said.
Warsh also firmly rejected any suggestion that the Fed might tolerate inflation above its existing objective.
"The Fed's price stability objective of 2%, as measured by the PCE price index, is a firm, fixed target."
This matters because the other side of the Fed's dual mandate—the labour market—currently gives policymakers some room to manoeuvre. Unemployment remains relatively low and, despite slower hiring, Warsh believes employment conditions remain consistent with the Fed's full-employment objective.
Inflation, therefore, remains the bigger concern.
Warsh stopped short of explicitly advocating another rate increase, but his warning was difficult to misinterpret: "We must be confident that underlying inflation is moving to our objective clearly and at sufficient speed. Otherwise, we have work to do."
For investors, that may be the most important sentence from Jackson Hole.
Warsh may have abandoned forward guidance, but he hasn't abandoned guidance altogether. The Fed's reaction function is becoming increasingly clear: if inflation continues moving convincingly towards 2%, rates can remain unchanged. If it doesn't, further tightening remains firmly on the table.
The Fed may no longer tell markets where interest rates are going. But it has told them exactly what to watch.