The Fed’s Reaction Function May Be Shifting — and Europe Should Pay Attention

The old shorthand is not wrong. It is just too simple.

The conventional market chain is familiar:

It captures a genuine risk. An economy that runs ahead of its productive capacity can create wage and price pressure, forcing the Federal Reserve to tighten.

But growth does not always arrive through demand alone. Investment in technology, infrastructure, logistics, energy, and productive capacity can raise the economy’s supply potential. When that happens, stronger activity may not carry the same inflationary signal.

This is not a new economic theory. It is, however, becoming a more practical market question. AI investment is accelerating; capital expenditure is rising; and energy policy is being treated increasingly as industrial policy. The variables that policymakers must weigh are becoming more complex.

Kevin Warsh’s Jackson Hole remarks captured the distinction unusually clearly. He said that the Fed’s task is to judge whether aggregate demand is broadly consistent with aggregate supply—while acknowledging that supply is inferred rather than directly observed. He also highlighted AI as a potential new factor of production and set out questions around its possible productivity effects.

That does not mean the Fed has abandoned its inflation mandate. Warsh was explicit that inflation remains above the 2% target and that price stability is the Fed’s central responsibility. But it does suggest a more nuanced reaction function: strong growth is not automatically inflationary if the supply side is expanding alongside it.

Is growth being driven by excess demand — or by an expansion in supply, productivity, and productive capacity?

Energy is part of the supply-side story

Energy affects far more than household fuel bills. It runs through manufacturing costs, transport, data centres, chemicals, capital investment, and the price of almost everything that is physically produced.

The U.S. administration is clearly treating domestic energy capacity as strategic infrastructure. In April, it issued a Section 303 Defense Production Act determination covering domestic petroleum production, refining, and logistics capacity.

It has also announced a Venezuela oil arrangement under which Venezuelan interim authorities granted 100-year concessions covering 17 oil fields with approximately 65 billion barrels of proven reserves to a private operator. The announcement describes U.S. governance and offtake rights, alongside a plan for up to $100 billion of investment in Venezuelan oil infrastructure.

These are announced rights and investment plans—not immediate barrels reaching global markets. Their commercial execution, timing, and geopolitical durability all remain uncertain. Yet the direction is unmistakable: the United States is seeking to widen its energy options and reinforce the energy base of its industrial economy.

The UAE’s exit from OPEC adds a separate but relevant signal. The withdrawal, effective 1 May 2026, does not dissolve OPEC+ or guarantee a surge in supply. But it does reduce the cohesion of a producer group that has historically shaped global supply expectations.

Taken together, these developments make a larger analytical question unavoidable: could abundant energy become a structural input into stronger, less inflationary U.S. growth?

The Treasury–Fed distinction matters too

There is another piece of the picture that markets may be underweighting: Treasury-market plumbing.

In August, the U.S. Treasury announced that it would at least double the maximum size of its nominal long-end liquidity-support buyback operations, from $2 billion to at least $4 billion per operation, starting 9 September. Treasury said the purpose was to provide greater liquidity support in longer-dated nominal securities.

That is not monetary policy, and it should not be portrayed as a substitute for the Fed. The distinction is essential. But it does show that Treasury is actively using debt-management tools to support the functioning of the world’s most important government-bond market.

Warsh, meanwhile, has argued for more restrained forward guidance and for market signals that are as unfiltered as possible. The result may be a market environment in which price discovery, Treasury-market conditions, and supply-side developments carry more weight than investors became accustomed to during the era of highly choreographed central-bank communication.

Why Europe should care

This is not merely an American macro story.

If the United States can combine AI-led productivity gains, sustained capital expenditure, energy abundance, and more flexible infrastructure build-out, it could deepen a cost and investment advantage over European industry.

Europe’s challenge is not that it lacks technology, capital, or industrial capability. It is that its cost base and implementation speed are structurally different. Energy prices, permitting timelines, grid constraints, fragmented capital markets, and uneven policy coordination can all make it harder to translate innovation into lower unit costs and productive capacity at scale.

The risk is not simply weaker European growth. It is a widening divergence in industrial economics: U.S. companies operating with lower marginal energy costs and faster investment cycles, while European firms face a more constrained input-cost environment.

That does not make the outcome inevitable. Europe can narrow the gap through faster permitting, grid investment, deeper capital markets, cheaper and more reliable power, and faster diffusion of automation and AI. But the strategic question is clear: if energy abundance becomes a competitive advantage, Europe cannot address competitiveness through regulation alone.

What markets may be missing

It would be a mistake to claim that a new U.S. economic architecture has already been completed. Too many variables remain uncertain: inflation, the execution of energy projects, global demand, geopolitics, and the pace at which AI becomes a broad productivity engine rather than a concentrated capital-spending cycle.

Still, the framework is worth watching:

This article is analysis and commentary, not investment advice.