Second-quarter GDP figures arrived this week for both the US and the euro area, and the coverage has been almost entirely about a single number.
US real GDP grew at an annualised rate of 1.5% in the second quarter, down from 2.1% in the first, and it came in weaker than the euro area, which managed 1.8%.
The US economy is slowing, it is now slowing faster than Europe, and the natural conclusion might be that the Federal Reserve has kept policy too tight for too long.
However, that conclusion is totally wrong. The Fed does not control real GDP growth – the Fed controls nominal GDP growth and that actually accelerated from 5.8% annualised growth in Q1 to 7.9% annualised growth in Q2.
So the Fed has actually been EASING rather than tightening monetary policy.
I have seen almost nobody make that point this week, and I find that genuinely puzzling, because the nominal number is not a technical footnote to the real number. It is the only one of the two that the Federal Open Market Committee decides.
What a central bank can and cannot do
Start with the identity that every monetarist starts with. MV = NGDP = PY. The money stock times the velocity of money equals nominal spending in the economy, which in turn equals the price level times real output. It is true by definition, so on its own it explains nothing at all, and in my experience that is precisely why it gets waved away by economists who ought to know better.
But it stops being empty the moment we add a single proposition, and the proposition is that real output over the medium term is determined by the supply side rather than by the central bank. By technology, the labour force, the capital stock, regulation, and the quality of institutions. I would concede that the Fed can push real output around for a few quarters, and that it can wreck an economy outright if the error is large enough, but it cannot raise the growth rate of productive capacity by printing money in the long run. Said in another way in the long run the Phillips curve is vertical.
Call that supply-determined growth rate Y*. If the Fed cannot change Y*, and if it has committed itself to 2% inflation, then the Fed’s job reduces to a piece of arithmetic: it has to deliver nominal spending growth of Y* plus 2%. Deliver more than that and you get more than 2% inflation, deliver less and you get less, and that is very nearly the whole of the theory of inflation a central bank actually requires.
Hence we do not need the Phillips curve here, and we do not need an estimate of r*, of u*, of the output gap, or of any of the other unobservable variables the FOMC spends its meetings arguing about. Take nominal GDP growth, subtract trend real growth, and look at what is left over.
That residual is the inflation rate the current stance of monetary policy is delivering, and I will call it implied inflation.
Choosing the starting point
The whole exercise turns on Y*, so let me be open about how I have arrived at it rather than pull a number out of a hat.
I have measured Y* as the average annualised quarterly growth rate of US real GDP from the first quarter of 2022 onwards. Not a Congressional Budget Office projection, not a Fed staff assumption, and not a number chosen because it produced the answer I wanted, but simply what the US economy has in fact delivered over the past four and a half years.
The reason I have chosen this period is that it is post-Covid distruptions. The choice that actually matters is the starting date, and my criterion is that the real economy should be roughly in balance at that point, because a base period taken during a collapse or a rebound measures the cycle rather than the trend.
Take a look at where that criterion leads. Going back to 2019 would mean averaging in the collapse of 2020 and the rebound of 2021, which tells us about lockdowns rather than about productive capacity. Starting in 2023 would mean measuring the supply side over a window short enough that a single strong quarter moves the answer. By the end of 2021 the labour market had normalised, unemployment had returned to something close to the structural rate, and the output gap had closed.
So the first quarter of 2022 is where the real economy stops telling us about the pandemic and starts telling us about the supply side. That gives Y* of 2.4% and therefore an implied NGDP target of 4.4% (2.4% + 2%) a year.
Note that the choice is conservative rather than convenient, because a lower estimate of trend growth would make the Fed look worse than it does here.

US nominal GDP indexed to Q1 of each year against a 4.4% implied target
Each coloured line is one calendar year of US nominal GDP, indexed to 1.00 in the first quarter and carried through to the first quarter of the following year, while the black dashed line is the 4.4% path. The figure in brackets beside each year label is the implied inflation that year’s nominal growth delivers.
Implied inflation came in at 8.9% in 2021, then 5.4% in 2022, then 3.1% in 2023, then 2.2% in 2024, then 3.7% in 2025, and the first half of 2026 is running at 5.5% annualised.
Not one of the twenty-one quarters sits below the line. Not one. So consider what this measure would have been telling the Fed in real time, because the sequence carries more information than any single reading does.
Through 2020 the Fed did the right thing and did it fast, because nominal spending collapsed, the Fed responded aggressively, and the collapse had been reversed inside a year.
From early 2021 the same measure turns from reassuring to alarming, and implied inflation of 8.9% is neither a rounding error nor a data artefact. Furthermore, the Fed could have seen it coming, because markets were pricing it well before the CPI showed it, and it spent that year explaining instead that the pressures were temporary and supply-related.
Then 2022 to 2024 is the stretch the Fed deserves real credit for. Implied inflation falls from 5.4% to 3.1% to 2.2%, which is a genuine disinflation achieved without a recession, and by 2024 nominal spending was within two tenths of a percentage point of the rate consistent with the target.
And then it reversed, with 2025 coming in at 3.7% and the first half of 2026 running at 5.5% annualised. Consider what the Fed was doing while that reversal was under way. It cut the funds rate three times in the autumn of 2025, in September, in October, and again in December, seventy-five basis points in total, into a year in which nominal spending was already accelerating away from the target, and it has held at every meeting since.
Said in another way, the Fed eased into an overshoot it had spent three years correcting.
The explanation everybody reaches for
There is a war in the Middle East, crude oil rose more than 20% in July alone, and the FOMC statement blamed energy prices explicitly. That argument is nonsense, and it is nonsense in a way that ought to be embarrassing for anybody who lived through 2021.
Hence we heard exactly the same argument five years ago, when inflation was supply chains, semiconductors, shipping containers, and pent-up demand for used cars. Every one of those explanations was a claim about relative prices dressed up as a claim about the general price level, and the general price level rose 20% anyway. Milton Friedman’s line survives contact with the evidence rather better than the alternatives do: inflation is always and everywhere a monetary phenomenon.
That being said, supply shocks obviously do move the inflation data from one month to the next, and I would never argue otherwise. What they cannot do is move nominal spending. Oil changes how a given quantity of money chasing goods divides itself between prices and output, and it does not change the quantity.
So don’t tell me that 7.9% nominal GDP growth is an oil story.
The control group is called the euro area
If the US overshoot were the product of an energy shock, then the shock ought to be visible in the other economies exposed to it, because the war in the Middle East is not a US event.
In fact the euro area imports a far larger share of its energy than the US does, so if the oil price were doing the work here, Europe should look worse rather than better.

Euro area nominal GDP indexed to Q1 of each year against a 3.1% implied target
Trend real growth in the euro area since the start of 2022 comes out at 1.1% on exactly the same measure, which gives an implied NGDP target of 3.1%. Implied inflation there runs 9.0, then 6.9, then 3.3, then 2.7, and then 1.7% in 2025, so the 2025 line finishes below the target path with three of its four quarters below it as well.
Take a look at the two starting points before anything else, because in 2021 implied inflation was 8.9% in the US and 9.0% in the euro area. Hence the initial error was not a US error and it was not a European error. It was the same error, made at the same time, on both sides of the Atlantic, and it was enormous.
Anybody who wants to argue that one of these two central banks was prudent in 2021 has not looked at the data.

Implied inflation, US and euro area
Then look at what came afterwards. Through 2024 the two track each other closely, with the euro area consistently a shade higher, and in 2025 the sign flips to 3.7% against 1.7%, while in the first half of 2026 the gap widens to two and a half percentage points.
That is about as close to a controlled experiment as macroeconomics ever gets, with the same shock, the same starting error, and the same global supply conditions producing opposite outcomes. Whatever explains the divergence differs between Washington and Frankfurt, and there is only one serious candidate.
It is not a supply shock. It is US monetary policy that is far too easy.
Credit where it is due
I have spent a lot of the past two decades criticising the European Central Bank and I have not been polite about it, so let me be equally direct in the other direction: the ECB has handled this well.
In June the Governing Council raised rates by 25 basis points, taking the deposit rate to 2.25%, and in doing so it became the first major central bank to tighten in the face of the energy shock. In July it held, unanimously, while making clear that several members had already asked whether a further increase was warranted and that September remains open.
Note that the question everybody in Frankfurt was arguing about is beside the point. Transitory or persistent, second-round effects or not, look through the oil price or do not: in my view none of it matters. Trend real growth in the euro area is somewhere between 1% and 1.5%, which puts the implied NGDP target between 3% and 3.5%, and the job is to keep nominal spending there whatever crude does.
So the transitory debate is not a hard question that the ECB happened to answer correctly. It is a question a central bank aiming at nominal stability never has to answer at all.
Measured against that target the ECB has delivered, because euro area nominal GDP grew 2.8% in 2025, which is at or below the bottom of the range whichever end of it you prefer.
Furthermore, Frankfurt had the harder task, since a target of 3% to 3.5% leaves very little room and the euro area therefore had to squeeze nominal demand considerably harder than the US did to reach the same inflation outcome. It did, and it worked. That European trend growth of barely 1% is dismal remains a damning verdict on European supply-side policy, but it is not a verdict on European monetary policy.
There is an irony here I cannot resist. In 2011 the ECB hiked twice in response to an energy price rise caused by a supply shock and very nearly killed the euro doing it. In 2026 it has tightened citing energy once more and happens this time to be right, not because the reasoning about oil has improved but because nominal spending was where it should be rather than collapsing.
Unfortunately the first half of 2026 is running at something like 4% nominal growth in the euro area on my estimate, so nobody in Frankfurt should be relaxing either. But the difference is one of degree and the degree is large, because an overshoot of half a percentage point is a monetary policy worth watching, while an overshoot of three and a half percentage points is a monetary policy that has lost its anchor altogether.
What happened on Wednesday
The FOMC left the funds rate unchanged at 3.5-3.75% on 29 July, for the fifth consecutive meeting, and three members dissented in favour of a quarter-point increase, which is the most dissents in one direction in a decade.
What followed was a press conference about forward guidance and about whether the chairman should publish his own projection.
Warsh was asked about a monthly consumer price print that had fallen 0.4%, and he answered that it was not much of a consideration for him while calling inflation elevated in the same breath. It is hard not to find Warsh’s performance internally contradictory.
My optimism has cooled sharply
I was optimistic after Warsh’s first press conference, and I said so at the time. I had been sceptical of him for months, because he spent last year campaigning for the job by telling the White House what it wanted to hear about lower rates and an AI-driven productivity boom.
And then his first meeting produced a much shorter statement, no forward guidance at all, and a single blunt sentence committing the Committee to deliver price stability, which is a large part of what I have argued for since I started writing about monetary policy.
I have not totally changed my mind about Warsh. But that optimism has cooled very sharply, and the reason is not the one people assume. The problem is not that he held rates, because holding is a decision like any other and there are meetings where it is the right one.
The problem is that he held rates while nominal spending grows at 7.9%, and then declined to say which number would make him act. A chairman who places credibility above every other virtue has now had two opportunities to tell us what he is targeting, and he has used both of them to explain why he will not.
Of course he is entitled to dislike forward guidance, and in fact I dislike it too. But refusing to pre-commit to a path for the policy rate is one thing and refusing to name the variable you are trying to control is quite another. The first is discretion about instruments. The second is discretion about objectives, and giving that up is what makes a central banker rule-based rather than merely well-spoken.
The pressure is real, and so is the arithmetic
US President Donald Trump has been explicit and public about what he wants from the Fed, including on the day of the meeting itself, when he backed the chairman and called the institution political in the same breath. The debt stock is around 100% of GDP, and the previous chairman faced a criminal referral for refusing to cut.
Unfortunately that configuration has a name. When the fiscal authority moves first and the monetary authority is left to finance whatever gap remains, controlling inflation stops being a question of will and becomes a question of arithmetic, and the arithmetic is unpleasant. So some part of what we are watching is a Fed that would like to tighten and finds that it cannot, and that part will grow rather than shrink as debt service rises.
But this is where I part company with the fatalists. Unpleasant arithmetic is a constraint rather than an excuse, and it binds through expectations, which are exactly what a central bank chairman is paid to manage. A chairman who names his target, explains his reaction function, and then demonstrates that he will act on it makes the fiscal authority’s problem harder and his own easier, while a chairman who names nothing at all makes precisely the opposite trade.
Hence the refusal to give guidance is not a technical preference about communication. It is the surrender of the one instrument that still works.
What I am asking for, and what it costs
I am not asking the Fed to bring nominal GDP back to the pre-2020 path. That path now sits some 15% below the actual level of nominal GDP, and closing the gap would require a contraction severe enough to produce a deep recession and, in all likelihood, a financial crisis alongside it. The mistake of 2021 cannot be undone, because it has been baked into the price level, and pretending otherwise is not toughness. It is vandalism.
What I am asking for is much smaller. Stabilise the growth rate, bring nominal spending back to roughly 4-4.5% a year and keep it there, say so publicly, and then let the market do most of the work of getting you there.
But I should be honest about the cost. Nominal growth has to fall by three and a half percentage points, and a slowdown of that size cannot be promised painless, since some of it comes out of prices and some out of output depending almost entirely on whether the announcement is believed.
Hence the argument for saying it clearly and saying it soon. The longer nominal spending runs at 8%, the more of the eventual adjustment lands on real activity rather than on inflation. And 2024 showed that the target is achievable, because the Fed came within two tenths of a percentage point of it without a recession.
Volcker, Greenspan, Burns and Miller
Let me be precise about what impressed me in June. The emphasis on rules rather than discretion, the scepticism about how far the Fed’s remit had expanded, the refusal to be sorted into either the hawk box or the dove box, and the insistence that money has something to do with monetary policy. That is the language of the Volcker and Greenspan era, and it had been absent from the Eccles Building for a very long time.
But six weeks and one meeting later, the language is still (partly) there and the policy is not.
Volcker’s distinguishing feature was not that he talked about credibility, because every central banker does that. It was that he named a nominal target, accepted an enormous real cost in order to hit it, and did not flinch when the US president’s party lost seats over it. Burns and Miller talked about credibility too, and what they actually did was let nominal spending run while explaining, meeting after meeting, that the inflation was caused by oil, by unions, by food prices, by anything at all except the money they were printing.
So Warsh has now had two meetings. At the first he asked for a good fight and got one, and at the second he got three votes for tightening from his own committee, which he treated as institutional health rather than as a signal that his colleagues think he is late.
Nominal GDP is growing at 7.9%, trend real growth is 2.4%, and the implied inflation embedded in the current stance of US monetary policy is above 5% and rising in a year when real output is growing below trend.
If nominal GDP continues to growth at close to 8% annually then US inflation will soon be heading forward 5% or more.
Warsh, you are way behind the curve. And the longer you refuse to say what you are targeting, the more the comparison stops being Volcker and Greenspan and starts being Burns and Miller.









