US Stock Market: Wall Street braces for Fed hike as rising yields threaten stock rally

Investors are heading into this week's Federal Reserve meeting increasingly prepared for a potential interest rate hike, a move that could put further pressure on a U.S. stock market rally already facing headwinds from rising Treasury yields.

The Fed has kept interest rates unchanged in 2026, but persistent inflation above its 2% annual target has strengthened expectations that policymakers could resume tightening. Rate increases are the central bank's traditional tool for curbing inflation by cooling demand.

Expectations for a September hike have risen following recent comments from new Fed Chair Kevin Warsh that investors broadly viewed as hawkish. However, some market participants remain sceptical that the central bank will deliver a rate increase at the conclusion of its two-day meeting on Wednesday.


Market expectations shifted further after data released on Friday showed U.S. consumer inflation accelerating in August. Core consumer prices, which exclude volatile food and energy costs, rose 0.3% during the month, above economists' expectations.

According to Reuters, the latest inflation reading has shifted market focus firmly towards the possibility of a September rate increase.

Stocks face a more challenging backdrop
A higher policy rate could weigh on equities through several channels. It would increase borrowing costs for households and companies while potentially pushing Treasury yields higher, making bonds more attractive relative to stocks and putting pressure on equity valuations.

The S&P 500 has gained nearly 12% in 2026, supported by strong corporate earnings and heavy investment in artificial intelligence infrastructure. But the benchmark index has recently pulled back and was about 2% below its mid-August record high.

At the same time, a selloff in the bond market has pushed Treasury yields to multiyear highs. The 10-year Treasury yield approached the 5% threshold, a level that could create additional challenges for equity valuations.

Investors are also monitoring heightened tensions between the United States and Iran, which have pushed oil prices above $100 a barrel. Stocks nevertheless gained on Friday as oil prices retreated.

Reuters reported that investors are increasingly focused on the combination of higher yields, rising expectations for rate increases and geopolitical uncertainty as potential sources of market volatility.

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Market odds favour a quarter-point hike
Fed funds futures indicated late Friday that traders were pricing in more than an 80% probability of a 25-basis-point rate increase, according to LSEG data.

Expectations have fluctuated in recent weeks as investors assessed economic indicators and comments from Fed officials. A stronger-than-expected employment report also helped increase the likelihood of a hike.

Inflation remains above the Fed's target. The latest core Personal Consumption Expenditures price index, a key measure watched by Fed policymakers, showed underlying inflation running at 3.3% annually.

Reuters noted that investors will be watching not only the rate decision but also whether the Fed signals that additional tightening could follow.

Is September a one-off hike or start of a cycle?
A key question for markets will be whether a September increase represents a single adjustment or the beginning of a broader rate-hiking cycle.

A hike accompanied by guidance that inflation remains a significant concern and that further increases could be necessary would likely be more challenging for equities. Conversely, a one-time increase could be interpreted as a measured response to persistent inflation.

Investors are also watching the Fed's credibility on inflation and questions surrounding its independence. The market's assessment of Warsh's approach to monetary policy could therefore become an important factor in the reaction to Wednesday's decision.

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Treasury yields remain a key risk
Higher policy rates could further lift Treasury yields, which have already risen sharply in recent weeks and weighed on stocks.

The 10-year Treasury yield climbed to 4.99% early Friday, its highest level in nearly three years, before ending the session at around 4.97%.

Higher yields could particularly affect rate-sensitive parts of the equity market. Smaller companies, which generally have greater reliance on debt financing, could face additional pressure as borrowing costs rise.

Still, the rise in yields is not entirely negative for equities. Reuters reported that some investors view higher yields as reflecting stronger expectations for economic growth. Robust corporate earnings have also provided support to stocks, potentially offsetting some of the pressure from higher real yields.

The market's reaction this week is therefore likely to depend not just on whether the Fed raises rates, but on how policymakers frame the outlook for inflation, economic growth and future rate moves.

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