Fed Shocks Markets With First Rate Rise in Three Years — And More Could Follow

NEW YORK, 17 September 2026 — EBM Newsdesk Analysis.Anthony Gill

The Federal Reserve has reopened a chapter that investors had largely assumed was finished. On Wednesday, the US central bank raised its benchmark interest rate by 25 basis points to a range of 3.75 per cent to 4 per cent, its first increase since July 2023, as policymakers confront an inflation problem that has proved stubbornly resistant to the easing in price pressures expected earlier in the cycle. The decision was unanimous, and the Fed signalled that another increase remains possible before the end of the year.

The significance of the move lies less in the quarter-point itself than in what it says about the economic environment. The Fed is not raising rates because the US economy is collapsing or because financial markets are in distress. Quite the opposite. Its latest assessment is that economic activity is expanding at a solid pace, domestic spending remains resilient, productivity growth is strong and capital investment is robust. The September projections put US GDP growth at 2.3 per cent for 2026, while the unemployment rate is expected to remain around 4.1 per cent.

That leaves inflation as the central problem. The Fed’s preferred PCE measure is projected at 3.7 per cent this year, well above its 2 per cent target, with core inflation at 3.4 per cent. The median projection does not see headline inflation returning to 2 per cent until 2029. That is a remarkably long distance for a central bank that had spent much of the previous cycle preparing investors for eventual monetary normalisation.

The economics are particularly awkward because much of the recent inflation pressure has a supply-side component. Higher energy prices, geopolitical disruption and tariffs can push up costs without necessarily reflecting excessive domestic demand. Yet the Fed cannot simply look through such shocks indefinitely. If businesses begin passing higher energy and import costs into wages and prices, a temporary shock can become embedded inflation. The central bank is therefore trying to prevent an energy and trade shock from becoming a broader expectations problem.

There is also a second layer to the story: the extraordinary scale of corporate investment. The US economy is experiencing a huge capital-spending cycle around artificial intelligence, data centres, semiconductors and power infrastructure. EBM has already examined how AI stocks are facing reality as investors question the sustainability of the spending boom. Higher interest rates matter here because projects whose returns arrive years into the future become less attractive as the cost of capital rises. The issue is not that the Fed is targeting AI; it is that monetary policy changes the financial mathematics underpinning the investment cycle.

Bond markets had already been warning that the inflation story was becoming more complicated. EBM recently examined how US Treasury yields are rising alongside European borrowing costs. Wednesday’s decision reinforces that trend. Higher short-term US rates can push yields higher across the curve, strengthen the dollar and make dollar-denominated financing more expensive for companies and governments outside the US.

For European businesses, the transmission mechanism matters. A stronger dollar can make energy and other commodities more expensive in euro or sterling terms, while higher US yields can pull international capital towards American assets. That complicates the decisions facing the European Central Bank and Bank of England, neither of which can simply copy the Fed because their domestic economies face different combinations of inflation and growth. EBM’s coverage of the European economy has increasingly focused on this divergence between monetary policy, energy costs and weak industrial demand.

The Fed’s projections provide another important clue. The median policymaker expects the federal funds rate to reach 4.1 per cent by the end of 2026, implying another quarter-point increase. Sixteen of the 18 officials who submitted rate projections expect at least one further hike this year. But the dispersion of forecasts is significant, suggesting that policymakers themselves disagree about how persistent the inflation problem will prove.

That uncertainty is crucial. Monetary policy works with a lag, so the Fed is effectively making a judgement about inflation that has not yet happened. Tighten too little and higher prices may become entrenched; tighten too much and an economy that currently looks remarkably resilient could slow sharply. The danger is particularly acute for heavily indebted businesses, property markets and companies dependent on continuous access to cheap financing.

Markets therefore have to adjust to a less comfortable interest-rate regime. The assumption that inflation would steadily fall and central banks would eventually cut rates has been replaced by something much more complicated: rates may remain elevated for longer, with energy prices, trade policy and investment demand all capable of changing the trajectory.

For investors, that makes Wednesday’s decision more than a technical adjustment. The Fed has effectively reminded markets that monetary policy can move in both directions. After three years without a rate increase, the question is no longer whether the tightening cycle is returning. It is how far policymakers will have to go to convince markets that the inflation problem is genuinely under control.

The next move is likely to be only 25 basis points. But economically, the message is considerably bigger: the era of assuming that interest rates can only come down is over.