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FTSE 100 Steady as Warsh's Hawkish Tone Boosts September Rate Hike Odds

FTSE 100 Steady as Warsh's Hawkish Tone Boosts September Rate Hike Odds
Markets · 2026
Photo · Marcus Devlin for Daily Digest Invest
By Marcus Devlin Equities Correspondent Aug 28, 2026 4 min read

UK stocks closed the week on a steady note, with the FTSE 100 edging up 0.3% to 10,824.26, while the mid-cap FTSE 250 rose 0.2% to 24,938.79, adding about 1% over the week. The calm market action masked a shift in sentiment among traders, who are now pricing in a higher chance of a US interest rate hike in September following hawkish remarks from a former Federal Reserve official.

Warsh's Jackson Hole Comments

Speaking at the annual Jackson Hole economic symposium, Kevin Warsh, a former Fed governor, said the central bank would “have work to do” if it cannot gain confidence that inflation is moving sustainably toward its target. His comments were interpreted by markets as a signal that the Fed may need to keep rates higher for longer, or even resume tightening, if price pressures persist.

As a result, the implied probability of a September rate hike jumped to nearly 60%, according to fed funds futures. That marks a notable increase from earlier in the week, when traders were more divided on the Fed's next move.

Warsh's remarks echo a theme that has been building in recent weeks: inflation remains stubbornly above the Fed's 2% goal, and policymakers are wary of declaring victory too soon. The Jackson Hole conference has historically been a platform for major policy signals, and this year's gathering has kept rate-sensitive markets on edge.

What It Means for UK Investors

For UK investors, the prospect of a US rate hike has ripple effects. A higher US rate tends to strengthen the dollar, which can weigh on commodities priced in dollars and affect multinational companies' earnings. It also influences global borrowing costs, potentially impacting UK mortgage rates and corporate debt.

The FTSE 100's resilience this week suggests that investors are taking the hawkish Fed talk in stride, perhaps because UK equities are seen as relatively cheap or because energy and commodity stocks have provided support. However, the index's flat weekly performance indicates that many are waiting for more clarity on the rate path.

As Warsh's inflation warning keeps stocks flat, the uncertainty around the rate path remains a key overhang for markets. Investors will be closely watching upcoming US inflation data and Fed speeches for further clues.

Broader Market Context

The steady close in London comes amid a mixed global backdrop. European markets have been similarly subdued, while US futures pointed to a modestly higher open. The gold price slipped as traders bet on a September Fed rate hike, reflecting the dollar's strength and higher yields.

In the UK, the FTSE 250's weekly gain of about 1% suggests some appetite for domestic mid-caps, which are more sensitive to the UK economy. That could be a sign that investors are looking past near-term rate worries and focusing on the potential for a soft landing.

Still, the path ahead is far from clear. If the Fed does hike in September, it would mark a reversal from the easing cycle that markets had anticipated earlier this year. That could trigger volatility across asset classes, including equities, bonds, and currencies.

What Investors Should Watch

For everyday investors, the key takeaway is that central bank policy remains the dominant driver of market moves. The odds of a September hike are now nearly 60%, but that could change quickly with new data or comments from Fed officials.

Investors should keep an eye on upcoming US inflation reports, jobs data, and any further speeches from Fed policymakers. These will provide clues about whether the Fed is truly leaning toward another hike or if Warsh's comments were just one voice in a broader debate.

In the meantime, UK stocks have shown resilience, but the dip in stocks ahead of Warsh's speech serves as a reminder that sentiment can shift quickly. Diversification and a long-term perspective remain prudent strategies in this uncertain environment.

As always, it's important to remember that market forecasts are not guarantees. The Fed's decisions will depend on incoming data, and investors should be prepared for multiple scenarios.

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