Waller Says August CPI Is Key to a Rate Decision

Waller’s remarks make the September 11 August CPI release the key near-term market catalyst ahead of the September 15–16 FOMC meeting. His reaction function is explicitly two-sided: continued disinflation supports a policy hold, while a hot reading could justify a hike because he views current policy as only slightly restrictive.

Market bias:

The statement is mixed but marginally less hawkish than the recent tightening narrative. Waller did not endorse an imminent hike; he indicated willingness to hold if inflation improves. This explains the reported trimming of rate-hike expectations after his comments. Nevertheless, the conditional threat of tightening limits the dovish interpretation and keeps front-end rates highly sensitive to CPI details.

• Treasuries: A downside CPI surprise would likely reinforce expectations for a hold, supporting front-end Treasury prices and pressuring two-year yields lower. A hot core reading—particularly one indicating renewed underlying price pressure—would increase hike probabilities, lifting short-dated yields and potentially flattening the curve.
• U.S. dollar: The dollar is likely to respond primarily through changes in front-end rate differentials. Hot inflation would be dollar-positive, while evidence of sustained disinflation could remove some of the recent rate-support premium.
• Equities: Softer inflation would reduce discount-rate pressure, particularly for long-duration growth and technology shares. A hot report would be more negative for high-multiple equities and interest-sensitive sectors, although financial stocks could receive some relative support from higher rates.
• Gold and crypto: Both remain vulnerable to a stronger dollar and higher real yields if CPI revives hike expectations. A softer inflation outcome would improve the liquidity and real-yield backdrop, but the response could be tempered if markets interpret weak inflation as evidence of deteriorating growth.
• Commodities: Energy prices and tariffs remain upside risks to inflation, but Waller indicated that their pass-through may not represent a persistent broad-based inflation impulse. Traders should therefore focus more on core services and other measures of underlying inflation than on headline volatility alone.

The main risk to a straightforward CPI-driven reaction is that the Fed’s decision may depend on breadth and persistence, not merely the headline or one monthly core figure. A hot headline caused by energy, but contained core services, could produce a less hawkish response; conversely, a modest headline gain accompanied by firm core components could materially increase hike expectations.

Traders should monitor the August core CPI monthly pace, shelter and services components, revisions, inflation expectations, and the August employment data due before the meeting. The subsequent tone from Chair Kevin Warsh and other FOMC members will determine whether Waller’s conditional stance represents a broader committee reaction function or only his individual view.