Warsh's Jackson Hole Speech Gives the Dollar a Reprieve — But Credibility Remains the Test

Having been appointed by President Trump, Warsh faces continued questions over whether his historically hawkish views on inflation will survive the clear political pressure from the White House to lower interest rates. His revised approach to monetary policy communication has also attracted scrutiny, as he argues for a less prescriptive Fed, with markets paying greater attention to economic data rather than trying to anticipate policymakers' next moves from their speeches.

Warsh Resets His Message at Jackson Hole

That new approach appeared to backfire at the Fed's July meeting. At the time, Warsh offered little justification for his vote to hold interest rates, or any indication of where policy was heading. This left markets uncertain about how to interpret the Fed's reaction function and, more importantly for the dollar, how seriously the new Fed chair intended to pursue the central bank's 2% inflation target. Against a backdrop of rising long-term Treasury yields and concerns over US fiscal policy, the result was broader doubts over the relative attractiveness of US assets.

Jackson Hole offered Warsh an opportunity to recalibrate and clarify his position without abandoning his preference for less forward guidance. He appears to have taken it.

Inflation Puts a September Rate Hike Back on the Table

The central message was that inflation remains the Fed's principal concern. Warsh was unequivocal that 2% PCE inflation remains a "firm, fixed target", while arguing that recent data had not provided sufficient evidence that underlying price pressures were moving decisively lower. The Fed's preferred PCE inflation measure was running at 3.7% in July, with the six-month annualised rate even higher at 4.1%. By contrast, Warsh described the labour market as broadly consistent with the Fed's other mandate of full employment, despite a recent slowdown in non-farm payrolls.

That combination matters. If the economy is still close to full employment while inflation remains well above target, the Fed has less reason to prioritise supporting demand through lower interest rates. Instead, Warsh indicated that if inflation does not move both clearly and sufficiently quickly towards 2%, "we will have work to do" — language that markets interpreted as putting a September rate increase firmly on the table.

Whether further rate hikes ultimately materialise is less important than the broader signal. Investors are being forced to reassess how restrictive monetary policy may need to remain if growth, employment, and inflation continue to outperform expectations.

The Dollar Gets a Near-Term Reprieve

The shift in expectations was immediate. Markets moved from pricing roughly a 35% probability of a September hike before the speech to around 60% afterwards, while the dollar rose sharply, gaining around 0.5% on the day. The dollar might have strengthened further had higher-than-expected eurozone inflation data not raised the possibility of further ECB tightening, limiting the change in the relative interest-rate outlook that ultimately drives much of the foreign-exchange market.

Warsh's message also reinforced concerns evident in the minutes of the July FOMC meeting. In addition to the three policymakers who voted for an immediate 25-basis-point rate increase, the minutes showed growing concern among the wider group about persistent inflation and whether inaction now might necessitate even firmer policy tightening later. The issue for the dollar is not simply whether Warsh is hawkish, but whether the rest of the Fed is likely to follow him.

That leaves the dollar with a stronger near-term interest-rate story, but a broader credibility problem remains.

Treasury Policy Complicates the Dollar Outlook

US Treasury yields have risen sharply this year, with the 30-year yield reaching a 19-year high of 5.34% as investors have become increasingly concerned about the combination of persistent inflation and rising government debt — which has now surpassed $40 trillion. The Treasury has responded by increasing its buybacks of longer-dated government bonds to contain disorderly moves in yields, although the intervention has also prompted criticism that the policy is intended, at least in part, to ease borrowing costs ahead of November's midterm elections.

For the dollar, the problem is that higher Treasury yields do not necessarily provide the usual support if they are being driven by concerns over fiscal sustainability rather than expectations of stronger growth or tighter monetary policy.

These interventions also create a complication for monetary policy. Higher long-term Treasury yields tighten financial conditions even when the Fed does not raise its policy rate, helping to restrain demand and inflation. Efforts to contain those yields can therefore work in the opposite direction to the Fed's inflation-fighting objectives.

September Will Put Warsh — and the Dollar — to the Test

This is where the September Fed meeting becomes particularly important. If inflation remains elevated and the Fed follows Warsh's Jackson Hole message with a rate increase, it would reinforce the idea that the central bank remains determined to operate independently and prioritise price stability, providing further support to the dollar. It would also demonstrate that Warsh's shift towards a more data-dependent Fed is compatible with decisive action when the data demand it.

Conversely, if the Fed leaves rates unchanged after having raised expectations of a hike, markets could question whether Warsh's tougher rhetoric represents a genuine change in the policy stance or simply a higher threshold for future easing. That would risk reversing some of the dollar's recent gains.

The political backdrop makes the outcome still more consequential. A September rate hike would come shortly before the November midterm elections, when the Trump administration is likely to remain focused on improving the political narrative around economic conditions and borrowing costs, potentially setting up a clash between the two over policy.

Key Takeaways for the Dollar Outlook

• Warsh's Jackson Hole speech raised the probability of a September rate hike from around 35% to 60%, giving the dollar a meaningful near-term boost.

• Inflation at 3.7% PCE — well above the Fed's 2% target — is the primary driver of the hawkish shift, with Warsh signalling "work to do" if progress stalls.

• Rising Treasury yields driven by fiscal concerns, not growth, complicate the usual dollar-support mechanism and remain a key risk to the dollar outlook.

• September's Fed meeting is the decisive test: a follow-through rate hike reinforces credibility; a hold risks undermining the gains made at Jackson Hole.

For the dollar, therefore, Jackson Hole represents a reprieve rather than a resolution. Warsh has given markets a clearer signal of intent over inflation and revived expectations of higher US interest rates. Whether that translates into a sustained recovery for the dollar will depend on whether the Fed follows through in the coming months — and whether US fiscal and political policy can avoid undermining the credibility that the central bank is now attempting to restore.