Zero Short-Term Real Interest Rates, “Trump Inflation” and the U.S. Economic Outlook.....

Introduction

The observation that the Federal Reserve still has to watch President Donald Trump’s reaction to a zero short-term real interest rate captures an important monetary-policy dilemma: when the nominal policy rate approaches expected inflation, the real short-term interest rate becomes close to zero, reducing the restraint on current consumption, borrowing and asset demand. Yet the present U.S. situation is more complicated because inflation is being generated by a combination of demand, tariffs, energy shocks, supply constraints, fiscal policy and geopolitical developments. The latest data show that U.S. CPI inflation was 3.4% in August 2026, while unemployment was 4.1%; the Federal Reserve therefore faces an economy that is not experiencing mass unemployment but is still running above its 2% inflation objective. The key issue is whether inflation remains primarily a price-level shock or becomes embedded in expectations, wages, rents and business pricing.

 

What Does a Zero Real Rate Mean?

A zero short-term real interest rate does not mean money is literally free; it means the nominal policy rate is approximately equal to expected inflation. For example, with a nominal federal-funds rate of 3.875% and one-year inflation expectations around 3.6%, the ex-ante real rate would be only about 0.3 percentage point. Using current CPI inflation of 3.4%, the ex-post real rate is about 0.5 percentage point. Thus, the Federal Reserve is no longer operating with an extremely negative real policy rate, but financial conditions are not overwhelmingly restrictive either. This distinction matters because a low real rate can sustain borrowing, housing demand, investment and consumption even when nominal rates appear relatively high. Conversely, if markets believe the Fed will eventually tolerate inflation at 3–4% and policy rates fall toward 1%, the implied real rate could become strongly negative. At 1% nominal interest with inflation remaining 3.4%, the ex-post real rate would be approximately -2.4%, creating a substantially more expansionary monetary environment.

 

Has “Trump Inflation” Materialised?

The phrase “Trump inflation” can be useful as a shorthand for inflationary pressures associated with policies implemented during Trump's presidency, but it should not be interpreted as evidence that Trump personally caused all current inflation. The strongest measurable policy channel is tariffs. Research from the Federal Reserve Bank of New York finds that around 26% of tariff increases associated with the 2025 tariff regime passed through into consumer prices, including both direct effects on imported goods and indirect effects through imported inputs and domestic producer mark-ups; the indirect channel can take nine to twelve months to appear. The Federal Reserve Bank of Minneapolis likewise estimates that tariff effects had become increasingly visible and were contributing roughly 0.4 percentage point to core PCE inflation through July, although other forces account for the remainder. Energy has also become unusually important: in August, U.S. energy prices were 16.3% above a year earlier and gasoline prices were 27.4% higher. Consequently, calling the present outcome entirely “Trump inflation” would be too broad, but saying that Trump-era trade and policy choices have contributed materially to inflation is consistent with available evidence.

 

Trump’s Interest-Rate Philosophy

Trump has repeatedly argued for much lower interest rates, and on September 16, 2026 he called for rates of 1% or lower after the Fed raised its policy range to 3.75–4.00%. His economic philosophy places considerable weight on cheap credit, stronger investment, reduced financing costs and a competitive U.S. economy. The tension is that policies intended to stimulate domestic production can simultaneously raise prices. Tariffs increase the cost of imported goods and intermediate inputs; restrictions on immigration can constrain labour supply in some industries; fiscal expansion can support demand; and geopolitical conflict can raise energy costs. Lowering rates into that environment could therefore create a second-round monetary effect: an initial tariff or energy shock raises prices, households expect higher inflation, businesses adjust prices and wages, and cheap credit then keeps aggregate demand stronger than it otherwise would be. The Fed's present response demonstrates the institutional conflict clearly: on September 16 it unanimously increased rates to 3.75–4.00%, while President Trump argued publicly for rates near 1%.

 

The Fed’s Current Response

The Federal Reserve under Chair Kevin Warsh is effectively saying that inflation has become the immediate constraint rather than unemployment. The September FOMC statement said economic activity was expanding at a solid pace, domestic spending remained resilient, productivity growth was strong, capital investment robust and job gains broadly kept pace with the workforce, while inflation remained elevated. The Fed's September projections put median 2026 PCE inflation at 3.7%, unemployment at 4.1% and real GDP growth at 2.3%; for 2027, the median projections were 2.3% inflation and 4.1% unemployment. Importantly, 16 of 18 policymakers indicated at least one further rate increase in the policy-rate distribution, showing that the current debate is not primarily about whether inflation exists but how much monetary restraint is required to prevent it becoming persistent.

 

Inflation Expectations Are the Crucial Test

The most important danger for the next stage is expectations rather than the current CPI number alone. The New York Fed's August 2026 household survey reported one-year inflation expectations of 3.6%, three-year expectations of 3.2% and five-year expectations of 3.0%. These numbers suggest that households have not lost all confidence in long-run price stability, but they are materially above the Fed's 2% objective. At the same time, the probability that households expected unemployment to be higher one year ahead rose to 44.4%, the highest reading since April 2020, while the perceived probability of finding another job after job loss fell to 45.4%. This combination is particularly significant because it means households may simultaneously expect prices to remain elevated and labour-market security to weaken. That is a much less comfortable environment than either high inflation with very strong employment or low inflation with weak employment.

 

What It Means for Employment and Investment

The likely transmission to U.S. citizens depends on whether inflation persists long enough to force additional monetary tightening. At present, unemployment is 4.1% and August payroll employment increased by 162,000, so the economy is not yet showing the classic pattern of a severe employment recession. Nevertheless, real average hourly earnings for all employees fell 0.3% over the year to August, meaning nominal wage growth of roughly 3.1% was insufficient to compensate fully for inflation. That weakens purchasing power even when employment remains relatively strong. Investment is more divided: AI, advanced technology, defence and capital-intensive industries continue to attract enormous funds, while higher interest rates and uncertainty raise financing costs for housing, small businesses and highly leveraged firms. Ten-year Treasury yields have recently been near 5%, while the Fed itself says capital investment remains robust. Thus, a low short-term real rate might initially encourage investment, but if investors expect persistent inflation and high long-term yields, the benefit of cheaper short-term borrowing can be offset by higher long-term required returns.

 

What to Expect Next for Ordinary Americans

The most plausible economic path is not necessarily a simple return to either very low inflation or a recession. If energy prices decline, tariff pass-through stabilizes, supply chains adjust and inflation expectations remain around 3%, the Fed could eventually reduce rates without generating a major unemployment increase. But if tariffs continue to feed through prices, energy remains expensive and domestic demand stays strong, the central bank may maintain or increase rates despite political pressure for cuts. For households, that would mean a prolonged period in which mortgage, credit-card and business borrowing costs remain high while purchasing power is constrained by inflation. A different scenario would emerge if the Fed were pushed toward a 1% policy rate while inflation remained near 3–4%: real rates would become sharply negative, consumption and asset prices could strengthen rapidly, but inflation expectations could rise further and long-term Treasury yields could move upward rather than downward. Citizens would then experience a paradox in which the central bank makes short-term credit cheaper while mortgages and long-duration borrowing remain expensive.

 

Conclusion

The central lesson of the present U.S. episode is that a zero or near-zero short-term real interest rate is not automatically stimulative in a benign way; its consequences depend on why inflation is high and what households and businesses expect the central bank to do next. The current data show that the United States is already experiencing a combination of 3.4% CPI inflation, 4.1% unemployment, weak real hourly earnings growth and elevated medium-term inflation expectations. Trump’s preference for rates of 1% or below points toward a much more expansionary real-rate regime, whereas the Fed's recent 3.75–4.00% rate shows an attempt to prevent supply shocks, tariffs and demand strength from becoming permanently embedded in expectations. The critical economic test ahead is therefore not simply whether inflation falls from 3.4% to 3.0%, but whether Americans begin to believe that 3–4% inflation is the new normal. If expectations remain anchored, investment and employment can absorb tighter monetary policy; if expectations become de-anchored, the United States could face the more difficult combination of persistently high inflation, higher long-term borrowing costs, weaker real wages and eventually softer employment.