Summary: Federal Reserve Governor Christopher Waller said he could support leaving interest rates unchanged in September if August data confirms that inflation is cooling. His remarks reduced the market-implied probability of a rate increase from roughly 63% to about 50%, helping equities rally and Treasury yields retreat. Investors should treat the reaction as a repricing of policy risk, not confirmation that the Fed will pause.
One speech changes the market’s assumptions
The Federal Reserve’s September interest-rate decision suddenly looks much less predictable.
Speaking at a Reuters event on September 3, Fed Governor Christopher Waller said he was inclined to support holding the federal funds rate at its current level if the next round of data shows continued progress toward the central bank’s 2% inflation objective.
The qualification is essential. Waller did not promise a pause. He said that a hotter August inflation reading could instead lead him to support an increase when the Federal Open Market Committee meets on September 15–16.
That conditional message was enough to move markets. The estimated probability of a September increase fell from 63.2% on Wednesday to approximately 50% following his remarks. Treasury yields declined, the dollar weakened and major equity markets advanced. Reuters reported that the MSCI global equity index rose about 1%, while Europe’s STOXX 600 gained 0.5%.
The response demonstrates how finely balanced monetary-policy expectations have become. A single influential policymaker did not settle the debate, but he moved the market from treating a September increase as the probable outcome to viewing the decision as close to a coin toss.
Why Waller is prepared to wait
Waller’s argument rests on a divergence between inflation’s still-elevated level and its more encouraging recent direction.
Headline personal consumption expenditures inflation was 3.7% over the 12 months through July, while core PCE inflation was 3.3%. Both remain clearly above the Fed’s 2% target.
However, Waller placed greater emphasis on shorter-term momentum. Annualised core inflation over the three months through July stood at 3.05%, down steadily from 4.76% in February. July headline and core PCE prices each increased 0.2% from the previous month.
He also argued that an imputed component covering certain non-market services accounted for approximately half of July’s core monthly increase. In his assessment, underlying inflation may therefore be improving somewhat faster than the aggregate core figure suggests.
Those observations led Waller to favour patience, provided August data continues the trend. His exact policy framework was straightforward: further disinflation would support an unchanged rate, while renewed acceleration could justify tighter policy. The official Federal Reserve speech explicitly describes this as a conditional reaction function rather than a commitment to a particular decision.
The economy is not forcing the Fed’s hand
Waller did not portray the US economy as weak. Real GDP expanded at a 1.8% annualised rate during the first half of 2026, while real private domestic final purchases rose 3%. He expects full-year economic growth to be slightly above 2%.
The labour market also remains broadly stable. Monthly payroll growth averaged approximately 60,000 through July, unemployment was 4.1%, and layoffs and initial unemployment claims remained low.
This matters because a resilient economy gives the Fed flexibility. Policymakers do not appear compelled to ease policy to counter a downturn, but neither must they necessarily tighten immediately if inflation continues to moderate.
Waller described the current policy setting as only slightly restrictive. That assessment limits how dovish investors should interpret his comments. If demand remains firm and inflation stops improving, he believes even a relatively small acceleration could warrant an increase.
The September decision is therefore becoming a test of inflation persistence rather than a referendum on recession risk.
Bonds and equities respond
The most direct reaction appeared in interest-rate markets. The benchmark 10-year Treasury yield fell to roughly 4.76% after reaching 4.82% on Wednesday, its highest level since November 2023. The more policy-sensitive two-year yield declined to 4.34% from 4.39%.
Equities welcomed the reduced probability of an immediate increase. The S&P 500 gained 1.1%, the Dow Jones Industrial Average rose 1.2%, and the Nasdaq Composite advanced 1.4%. Technology and communication-services shares led the rally, reflecting their greater sensitivity to discount rates and long-duration valuation assumptions. AP’s closing-market report placed the S&P 500 at 7,747.71 and the Nasdaq at 26,584.06.
Currency markets also registered the shift. The dollar index fell 0.72%, while the yen strengthened approximately 2% as expectations for higher Japanese rates added to the move.
These reactions were directionally consistent: reduced expectations of near-term US tightening lowered yields, weakened the dollar and supported risk assets.
One data release now carries unusual weight
August inflation figures, scheduled for September 11, are now the pivotal input for the Fed meeting. AP described the decision as being on a “knife edge” after Waller’s comments reduced implied hike odds to approximately 50-50. Its policy report also noted that Chair Kevin Warsh’s more inflation-focused Jackson Hole remarks had helped push hike expectations higher only days earlier.
Investors will need to examine more than the headline inflation rate. Core monthly momentum, services inflation, the breadth of price increases and revisions to previous readings could all influence the committee.
Upcoming employment figures also matter, but Waller indicated that inflation would have greater influence on his own decision. That makes the September meeting unusually sensitive to a narrow window of data.
What investors should take away
The September 3 rally should not be interpreted as proof that the tightening cycle has ended. Markets repriced the probability of one decision; they did not receive a policy guarantee.
For equity investors, lower yields offer near-term support to long-duration growth shares, but that benefit can reverse quickly if inflation surprises higher. For bond investors, the retreat in yields provides some relief after a difficult period, yet fiscal concerns, heavy issuance and persistent inflation continue to affect longer maturities.
Currency investors face a widening contrast between an uncertain Fed decision and firmer expectations for additional Japanese tightening.
The practical conclusion is that short-term policy risk has become more balanced, not less important. Waller reopened the path to a September pause, but the next inflation report will determine whether markets can remain on it.
