Kevin Warsh's hawkish Jackson Hole speech lifts September rate hike odds, pressures stocks

The implied likelihood of a September rate increase jumped to roughly 58% from 35% the prior day, driven by Kevin Warsh's Jackson Hole remarks — a sharp repricing over a very short timeframe. Short-dated Treasury yields advanced more than long-dated ones, highlighting the close connection between near-term Fed expectations and the front end of the curve. Domestic-focused equities lagged, with small-cap and industrial stocks falling the most, a move that matches markets pricing in tighter monetary policy amid signs of softening consumer spending. The hawkish turn also complicates the recent stabilization in longer-term yields seen after the Treasury's buyback announcement, as a more aggressive Fed removes some of the downward pressure on those yields. With summer trading volumes thin and the Fed decision still three weeks away, positioning could stay volatile up to the September 16 meeting.

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Additional news ahead of the Globex open at 6pm US Eastern time:

• U.S. military struck two Iranian rocket launchers near the Strait of Hormuz.

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Kevin Warsh's inflation caution at Jackson Hole rekindled expectations of a rate hike and unsettled markets precisely when investors had anticipated the summer calm to persist.

Summary of developments:

• Fed Chair Kevin Warsh expressed more concern about inflation than anticipated at the Kansas City Fed's Jackson Hole symposium.
• According to interest-rate futures, the probability of a September hike stood at about 58%, up from 35% the day before.
• The Dow fell less than 0.1%, the S&P 500 lost 0.2%, and the Nasdaq declined 0.5% — a more muted response compared with Warsh's June and July appearances.
• The speech alleviated fears that Warsh would avoid rate hikes under political pressure, but sparked worry that the Fed now feels compelled to raise rates regardless of upcoming economic data.
• The 30-year Treasury yield declined to 5.207% after the Treasury doubled its long-bond buyback program, while the 10-year yield rose to 4.721%.
• Small-cap and industrial stocks underperformed, and the S&P 500 sits about 1% below its record high as the September 16 Fed decision approaches.

On Friday, Fed Chairman Kevin Warsh rattled markets with more hawkish-than-expected inflation remarks, pushing short-term Treasury yields up and dragging major stock indexes down, the Wall Street Journal reported. The comments, made at the Kansas City Fed's Jackson Hole symposium, led traders to assign a roughly 58% chance of a September rate increase, a sharp jump from 35% the previous day, according to CME Group data.

The market reaction was less dramatic than following Warsh's two earlier major appearances since becoming chairman. His June press conference caught markets off guard with similar inflation warnings, whereas his July remarks had the reverse effect, raising questions about whether he would match hawkish words with action. Friday's speech fell somewhere in between, leaving investors unsure if the Fed is determined to hike or merely reserving its options until the September 16 meeting.

In recent months, bonds have been the most volatile asset class even as equities kept rising. After the July Fed meeting, the 30-year Treasury yield climbed above 5.3%, its highest since 2007, which prompted the Treasury Department to announce a doubling of its buyback program purchases. Treasury Secretary Scott Bessent stated the move aimed to reduce long-term yields that he considered disconnected from economic fundamentals, and it initially seemed effective: the 30-year yield fell to 5.207% by Friday, although the 10-year yield, more relevant to consumers, rose to 4.721%.

Equity investors have mostly ignored bond market volatility, concentrating instead on the waning days of earnings season and a strong Nvidia earnings report that allayed fears about AI chip demand. Nevertheless, Friday's losses in small-cap and industrial stocks indicate markets are still reactive to uncertainty about the rate path. With trading volumes near year lows and September typically a tough month for equities, the focus now shifts to whether upcoming economic data confirms the hawkish stance or prompts another shift from Warsh ahead of the Fed's decision.