GDP Growth Isn’t Prosperity

Originally published on Substack. 

The latest US GDP report is being sold as proof the economy is strong again. That conclusion is convenient. It’s also incomplete.

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Yes, real GDP grew at a solid pace. But when you dig into the details, the story becomes far less reassuring. The economy is growing in ways that are fragile, policy-distorted, and increasingly inflation-constrained. That combination should concern anyone serious about long-run prosperity.

Private Investment Is the Growth Engine—and It’s Stalling

The most important fact buried in the data from the Bureau of Economic Analysis isn’t the headline growth rate. It’s this:
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Gross private domestic investment has been a negative contributor to real GDP growth in three of the last four quarters.

The only exception was Q1 2025, before tariffs and renewed protectionism began distorting trade flows and investment incentives. Since then, private investment has repeatedly subtracted from growth.

You can see this clearly in the BEA GDP tables and the National Income and Product Accounts.

This matters because private investment is how an economy builds productive capacity. It’s how businesses adopt new technology, improve productivity, and raise wages sustainably. An economy can seemingly coast on consumer spending and government outlays for a while, but it is weak growth that cannot compound without investment.

When investment weakens quarter after quarter, it’s not an accident. It reflects rising policy uncertainty, higher costs, and incentives that discourage long-term planning.

Why Imports Aren’t “Hurting” GDP

Another widely misunderstood point: imports.

Imports are subtracted from GDP only to avoid double-counting, not because imports are bad for the economy. When a household buys an imported good, that purchase is already counted in personal consumption expenditures. Subtracting imports simply prevents counting the same transaction twice.

The accounting identity is straightforward:

GDP = C + I + G + (X – M)

So when imports fall, GDP can mechanically rise even if overall economic activity weakens. That’s not strength. That’s math.

Recent GDP growth has been flattered by falling imports, not by a surge in productive domestic investment. Treating that as economic progress leads directly to bad policy.

Tariffs Distort Trade—and the Growth Story

This distortion is magnified by protectionism.

Tariffs disrupt supply chains, raise input costs, invite retaliation, and inject uncertainty into investment decisions. Exports suffer. Imports fall for the wrong reasons. GDP can look better on paper while the real economy becomes less efficient and less competitive.

Independent analysis from the Yale Budget Lab shows tariffs reduce long-run output, real incomes, and private investment—even when short-term GDP arithmetic looks favorable.

In other words, tariffs can improve the scoreboard while shrinking the field of play.

Inflation Is Heating Up—and That Makes Growth More Fragile
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Layered on top of this weak investment picture is another growing problem: inflation is moving in the wrong direction.
Data from the PCE Price Index show that inflation picked up again in Q3. More importantly, core PCE inflation is now running closer to 3%, not the 2% target the Federal Reserve claims to aim for.

That’s not a trivial difference. Inflation near 3% erodes real incomes, complicates business planning, and makes consumption-driven growth harder to sustain. It also forces interest rates to stay higher for longer, which further weighs on private investment—the very area already dragging GDP down.

This raises an uncomfortable question: is 3% quietly becoming the Fed’s new target?

If so, that would be bad news. A higher inflation “tolerance” acts like a tax on savings, distorts capital allocation, and locks in weaker long-run growth. It leaves us with the worst of both worlds: fragile growth and persistent price pressure.

The Bottom Line

GDP growth is not the goal. Prosperity is.

An economy where private investment subtracts from growth in three of four quarters, where imports “boost” GDP through accounting mechanics, and where inflation drifts farther from target is not as strong as the headlines suggest.

If we want durable growth, we need pro-growth policies: stable fiscal and monetary rules, unhampered markets, lower barriers to capital formation, and less government interference that raises costs and uncertainty.

Growth comes from producing more, investing more, and letting people build—not from celebrating fragile numbers or redefining success.