NEW YORK — Wall Street is heading into one of the Federal Reserve’s most closely watched policy meetings of the year with a scenario few investors were confidently predicting just weeks ago: U.S. interest rates could be going up again.
After months of holding borrowing costs steady, the Federal Reserve is now widely expected by financial markets to consider raising its benchmark rate by 25 basis points when its September 15-16 policy meeting concludes Wednesday.
And the real question for investors may no longer be simply whether the Fed hikes.
It is whether one increase turns into several.
Financial markets dramatically increased their bets on tighter monetary policy after the latest U.S. inflation report showed that price pressures remain stubborn.
The Consumer Price Index rose 0.4% in August from July, while annual inflation held at 3.4%. Core CPI, which strips out volatile food and energy prices, increased 0.3% month-on-month, above economists’ forecast for a 0.2% increase. Annual core inflation eased slightly to 2.4%.
That seemingly small 0.1-percentage-point surprise in monthly core inflation was enough to dramatically reshape expectations for Wednesday’s Fed decision.
By Friday, interest-rate futures indicated a nearly 90% probability of a quarter-point increase, according to Reuters, up from about 72% a day earlier.
That would take the Fed’s current target range of 3.50% to 3.75% another step higher.
A Fed Decision That Changed in Days
The shift is striking because economists were considerably less convinced only days earlier.
In a Reuters survey conducted from September 4 through September 9, 65 of 93 economists, or roughly 70%, predicted the Fed would keep rates unchanged at its September meeting. Only 28 expected a quarter-point increase.
Then the inflation numbers arrived.
Combined with stronger employment data and rising energy prices, they strengthened the argument that the Fed may not yet have done enough to push inflation sustainably back toward its 2% target.
The U.S. economy added 162,000 jobs in August, considerably stronger than July’s 21,000 increase, while unemployment remained at a relatively low 4.1%, according to the Bureau of Labor Statistics.
That combination—persistent inflation and resilient employment—gives policymakers more room to tighten monetary policy without immediately risking a major deterioration in the labor market.
Fed Governor Christopher Waller had signaled earlier this month that he could favor leaving rates unchanged if inflation continued cooling. But he also made clear that if August data showed the improvement was temporary, a rate increase at the September meeting could be appropriate.
The latest numbers have made that second scenario increasingly difficult for markets to ignore.
The Oil Shock Complicates Everything
The Fed is also dealing with an inflation risk it cannot easily control: energy.
Escalating conflict involving the United States and Iran has disrupted energy markets and pushed Brent crude back above $100 a barrel.
Brent ended Friday above $104 even after falling almost 3% during the session and remained roughly 9% higher for the week.
Gasoline was already a major factor in August inflation. Prices at the pump jumped 3.9% during the month, accounting for more than one-third of the increase in headline CPI.
That creates a difficult problem for the Fed.
Raising interest rates cannot produce more oil or reopen disrupted shipping routes. But policymakers also cannot ignore an energy shock if it begins pushing up prices throughout the economy or changing consumers’ inflation expectations.
The Financial Times similarly reported that persistent inflation and sharply higher crude prices have increased pressure on Fed Chair Kevin Warsh to tighten policy, even as uncertainty remains over how persistent those price pressures will become.
Wall Street Has Another Problem: The 5% Treasury Yield
Investors are not only watching the Fed’s policy rate.
They are watching the bond market.
The benchmark 10-year U.S. Treasury yield climbed as high as roughly 4.99% Friday, its highest level in nearly three years, before easing slightly.
The psychologically important 5% level matters because Treasury bonds become increasingly attractive alternatives to stocks as their yields rise.
Higher yields can also make mortgages, corporate debt, credit cards and other borrowing more expensive.
For companies, that means higher financing costs. For investors, it can mean lower valuations—particularly for growth stocks whose prices depend heavily on expectations of profits far into the future.
Smaller businesses could be especially exposed because they are generally more dependent on borrowing than major corporations with large cash reserves.
Yet Wall Street Is Still Rallying
Perhaps the most unusual part of the story is that investors are not exactly running for the exits.
The S&P 500 rose 0.86% Friday, the Nasdaq gained 0.96% and the Dow advanced 0.98%, despite the sharp increase in expectations for a Fed hike.
The S&P 500 is still up roughly 12% in 2026, supported by robust corporate earnings and extraordinary spending on artificial-intelligence infrastructure, although it remains around 2% below its August record and finished the week down about 0.8%.
That suggests investors may be willing to tolerate one rate increase if they believe it prevents inflation from becoming entrenched without derailing economic growth.
But multiple hikes would be another matter.
The Biggest Question Comes After Wednesday
A quarter-point increase on September 16 could already be largely reflected in asset prices.
What markets may react to much more aggressively is what Fed Chair Kevin Warsh says afterward.
Investors will parse every signal for clues about whether a September hike is an insurance move designed to contain inflation—or the beginning of a renewed tightening cycle extending into December and potentially 2027.
Reuters reported that futures markets are already beginning to price the possibility of another increase later this year.
That distinction could determine what comes next for stocks, Treasury yields, mortgages, corporate borrowing costs and the dollar.
A single hike might be absorbed relatively smoothly.
A message that several more are coming could force Wall Street to rethink valuations across the market.
And with inflation still above target, oil above $100, unemployment at just 4.1% and the 10-year Treasury yield flirting with 5%, Wednesday’s decision may be about much more than 25 basis points.
It could reveal whether America is witnessing one final inflation-fighting adjustment—or the start of an interest-rate cycle investors thought was already over.
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