Why the Fed's Stubborn Inflation Is a Global Warning Signal

The number nobody is celebrating

Core PCE inflation sat at 3.3% in July. Not worse than June. Not better. Exactly where it was before the Iran conflict pushed energy costs higher, before new tariff threats on Canada and China added another layer of uncertainty, and before the AI infrastructure buildout started lifting prices on computers, gaming consoles, and semiconductors.

Three major inflationary shocks are converging at once. And the Federal Reserve’s preferred gauge refuses to move meaningfully toward its 2% target.

That matters far beyond the 10 weeks remaining until the midterm elections.

A gauge with a math problem

The Commerce Department reported Wednesday that headline PCE rose 3.7% year-over-year in July—unchanged from June but noticeably worse than the 2.9% recorded before the US and Israel attacked Iran in late February. Core PCE held at 3.3%, having fallen from that level to 2.6% only after the tariff episode in April 2025 had already passed.

On a monthly basis, overall prices climbed 0.2% from June to July. Core prices also rose 0.2%, up from 0.1% the prior month. Some Fed officials have suggested that sustained 0.2% monthly core increases would be a sign inflation is heading back to target. The problem is that 0.2% a month compounds to roughly 2.4% annually—still above the Fed’s goal, and far enough above it that real borrowing costs remain restrictive for as long as the rate stays there.

There is also a statistical quirk worth flagging. The PCE index has been pushed higher by how the government calculates financial advice costs and software pricing. When stock markets rise, portfolio management service costs register as larger gains—even though Americans don’t necessarily pay more for those services. Meanwhile, the index captures some business software spending that should be excluded from a consumer measure. The Commerce Department plans to adjust these calculations starting next month, and economists expect the revision will lower annual PCE inflation by roughly 0.2 percentage points.

That sounds like progress. But it would be progress on paper, not in the supermarket or at the gas pump.

Three pressures, one stubborn number

The inflation picture since February is essentially a story of competing forces cancelling each other out—and losing.

On one side, gas prices fell briefly after the initial conflict spike, giving July’s headline PCE a modest monthly dip in June. On the other, service-sector costs jumped: health care, utilities, and financial services all accelerated. Gas prices have since rebounded to $4.10 per gallon nationally, according to AAA, and will likely push August inflation higher when those figures arrive next month.

Then there is the AI infrastructure boom. Businesses are investing aggressively, and that investment is reflected in higher prices for computers, gaming consoles, and semiconductors. The economy grew just 1.5% in the second quarter, but much of that business spending flowed into imports rather than domestic output. Consumers adjusted accordingly: inflation-adjusted spending was unchanged in July after a robust April-to-June stretch.

Real incomes tell the clearest story. They rose just 0.2% year-over-year through July, after several months of decline. Inflation has eroded purchasing power even as the headline rate has cooled from its 2022 peak above 7%. That gap between data and lived experience explains why consumer sentiment remains gloomy and why inflation will be a defining midterm issue.

The Fed’s credibility test

This is where the global implications sharpen.

The Federal Reserve is split. Most officials favor holding rates steady to see whether inflation cools organically. A significant faction supports raising rates to force borrowing and spending down. Fed Chair Kevin Warsh is set to deliver his Jackson Hole speech on Friday, and Wall Street is parsing every word for clarity that currently does not exist.

That ambiguity has consequences. Long-term interest rates have climbed because markets are pricing in persistent inflation and uncertain policy response. The yield on 30-year Treasury bonds briefly hit a 19-year high earlier this month. Treasury Secretary Scott Bessent responded with an unusual intervention: doubling buybacks of longer-term bonds, those maturing in 10 to 30 years, starting next month. The theory is straightforward—buying bonds raises their price and lowers yields. The result was minimal. Yields declined only slightly after the announcement.

This is a central bank under pressure from multiple directions, and a Treasury department trying to subsidize monetary policy through the back door. Neither signal inspires confidence.

Why the world should care

The dollar remains the global reserve currency precisely because the Federal Reserve is perceived as credible. That perception is not guaranteed. When a central bank allows inflation to stagnate well above target while juggling trade wars, geopolitical conflicts, and domestic political cycles, the message to international investors is that US policy is being driven by circumstance rather than principle.

Emerging markets watch this closely. A Fed that cannot credibly commit to 2% inflation encourages capital flight from developing economies and strengthens the dollar’s grip on global debt. Countries holding dollar-denominated liabilities face a double squeeze: higher borrowing costs at home and a more expensive external debt burden.

The tariff threats against Canada and China add another dimension. Even if those tariffs are ultimately scaled back, the mere prospect raises input costs for North American supply chains and complicates the calculus for central banks in Mexico, Brazil, and elsewhere that monitor US inflation as a leading indicator.

What happens next

The Commerce Department’s upcoming methodological revision will produce a cleaner PCE reading, but it will not change the underlying dynamic. Core inflation at 3.3% with real income growth near zero and gas prices climbing is not a situation that resolves itself.

Warsh’s Jackson Hole speech will be the next data point. If he signals a willingness to raise rates despite the political calendar, markets may stabilize. If he hints at patience—or worse, ambiguity—expect yields to climb further and the dollar to strengthen at the expense of emerging market currencies.

The midterms are 10 weeks away. Politicians will blame inflation on everyone except the Fed. The Fed will blame inflation on everyone but itself. And Americans will continue paying more for health care, utilities, and a gallon of gas that just won’t stay down.

The durability of central bank credibility depends on whether the Fed can demonstrate that 2% is a target, not a suggestion. So far, the evidence is uncomfortable.