Wall Street is changing its mind about the Federal Reserve.

Goldman Sachs is now expecting the U.S. central bank to raise interest rates by 25 basis points at its September 15–16 meeting — a major shift from the expectation that policymakers would keep rates unchanged.

The change reflects a rapidly deteriorating inflation outlook.

August consumer-price data came in stronger than expected, while crude oil has surged above $100 a barrel as geopolitical tensions threaten global energy supplies. Together, those developments have forced Wall Street to reconsider a monetary-policy path that had looked relatively straightforward only weeks ago.

Goldman is not alone.

JPMorgan, HSBC and Deutsche Bank have also moved toward forecasting a quarter-point Fed increase. Markets are now assigning around a 90% probability to a hike this week, up sharply from roughly 70% before the latest inflation data.

The significance goes well beyond one 25-basis-point move.

Investors are now confronting the possibility that the Fed may be entering a new phase in which interest rates remain higher for longer than previously expected — and possibly rise again later in the year.

For much of the year, financial markets had been positioned around the expectation that inflation would continue moving lower.

That assumption supported the idea that the Fed could eventually cut rates or at least maintain a less restrictive policy stance.

Then the data changed.

August inflation was stronger than expected, and several underlying categories showed renewed pressure. At the same time, oil prices have surged as geopolitical disruptions threaten energy supply routes.

The combination is particularly uncomfortable for central bankers.

Energy prices can temporarily raise headline inflation.

But if higher oil prices remain elevated for long enough, their effects can spill into transportation, services, wages and consumer expectations.

That creates the risk of a second wave of inflation.

The shift in Goldman's forecast is important because markets have been unusually focused on the composition of recent inflation.

A single weak or strong number is rarely enough to change the Federal Reserve's entire policy trajectory.

But when inflation momentum begins appearing across multiple categories while energy prices rise at the same time, the probability of a policy response increases.

Goldman now sees the balance of risks differently.

Instead of asking whether the Fed might hike, investors are increasingly asking what the Fed will say about additional hikes after this week's decision.

That distinction could become the real market-moving event.

This is where the story becomes complicated.

A 25-basis-point increase would not, by itself, represent an aggressive monetary-policy shock.

But financial markets rarely trade only the current rate.

They trade expectations for the future.

If Fed Chair Kevin Warsh signals that policymakers believe inflation pressures will fade, Treasury yields could stabilize.

If he signals that additional tightening may be necessary, yields could climb further.

The difference could have enormous consequences for stocks, bonds, currencies and cryptocurrencies.

Oil is perhaps the biggest wild card.

Brent crude has pushed above $107 a barrel after attacks on Saudi energy infrastructure and threats around major shipping routes.

For the Fed, this presents an uncomfortable problem.

A geopolitical oil shock cannot be solved with monetary policy.

Higher interest rates cannot repair a damaged pipeline or make shipping lanes safer.

But policymakers still have to respond if the shock threatens to push broader inflation higher.

That creates a difficult question:

How much inflation should the Fed tolerate when the original cause is outside its control?

Central banks generally try to look through temporary supply shocks.

But there is a limit.

If households begin expecting persistently higher prices, businesses gain greater pricing power and wage negotiations adjust upward, the shock becomes much harder to dismiss.

The emerging consensus is becoming more hawkish.

Reuters reports that Goldman, JPMorgan, HSBC and Deutsche Bank now expect a quarter-point hike, while investors are pricing roughly 90% odds of an increase. Goldman still sees rate cuts eventually returning in 2027, but the expected easing path has been delayed.

That final detail is extremely important.

Goldman is not predicting an endless tightening cycle.

Instead, the bank is effectively saying the Fed may need to keep policy restrictive for longer before inflation is sufficiently under control to justify meaningful easing.

For asset markets, that distinction matters.

A delayed easing cycle means a higher discount rate for longer.

That can be particularly painful for technology companies whose valuations depend heavily on future earnings.

Investors sometimes focus too heavily on the central bank's policy rate.

But the market's reaction may be driven more by Treasury yields.

Long-term yields incorporate expectations for inflation, growth and future Fed policy.

If the Fed raises rates while investors believe inflation will remain stubborn, the 10-year and 30-year Treasury yields could remain elevated.

That would tighten financial conditions beyond the Fed's official policy move.

It would also increase financing costs for companies and households.

Mortgage rates could stay higher.

Corporate borrowing could become more expensive.

And equity valuations could face further pressure.

Higher U.S. rates can also support the dollar.

That creates another complication for global markets.

A stronger dollar can put pressure on emerging-market currencies and make dollar-denominated debt more expensive.

For commodities priced in dollars, the relationship is more complicated because stronger oil prices can simultaneously support and pressure different economies.

Gold also faces a tug-of-war.

A stronger dollar and higher yields can weigh on gold, while geopolitical uncertainty and inflation fears can increase safe-haven demand.

Bitcoin and other digital assets are particularly sensitive to changes in liquidity expectations.

A Fed hike reduces the probability of near-term monetary easing, which can pressure speculative assets.

Reuters noted that Bitcoin's recovery toward $70,000 is now facing a significant test from both the Fed decision and the Senate's forthcoming crypto legislation.

That means crypto traders are suddenly watching Washington and the Federal Reserve simultaneously.

A hawkish Fed can tighten liquidity.

A favorable crypto bill could improve sentiment and regulatory expectations.

The result is a market pulled in two opposing directions.

Goldman Sachs carries unusual influence in global markets.

When the bank changes a major macro call, other investors and institutions often reassess their own positioning.

This particular revision is especially meaningful because it reflects a wider shift rather than an isolated analyst view.

Several major banks have now moved toward the same conclusion.

The market is therefore entering the Fed meeting with a relatively clear expectation of a hike.

But certainty about the immediate decision does not mean certainty about the future.

The real market-moving question will be what comes next.

Warsh faces a difficult balancing act.

If he sounds too dovish while inflation remains stubborn, markets may conclude that the Fed is falling behind the curve.

If he sounds too hawkish, financial conditions could tighten sharply and increase recession risks.

And with political pressure already surrounding interest-rate policy, the Fed's communication will be scrutinized intensely.

The central bank therefore has to do more than raise rates.

It has to explain why.

“Higher for longer” has been used repeatedly over the past several years.

But it may be taking on new meaning.

This time, the argument is not primarily about the legacy of pandemic inflation.

It is about a new combination of geopolitical energy shocks, persistent domestic inflation and rising market expectations.

Goldman's policy reversal is therefore not simply a forecast update.

It is a signal that Wall Street is recalculating the entire interest-rate landscape.

The question is no longer whether the Fed can cut.

It is whether inflation will allow it to cut soon enough for markets to feel comfortable.

For now, Goldman is betting the answer is no.