The divergence between the US and UK economies has never been starker. Across the Atlantic, American GDP growth confounds the pessimists, fuelled by a fiscal stimulus that makes a mockery of conventional prudence. Here in London, we are engaged in a very different experiment: one of austerity, restraint, and the slow grind of fiscal consolidation. But which path is the right one? The answer, as always, lies in the numbers.
Let’s start with the United States. The US economy grew at an annualised rate of 2.8% in the second quarter, defying predictions of a recession that have been circulating since the Federal Reserve began its hiking cycle. Consumer spending remains robust, the labour market is tight, and corporate profits are holding up. How is this possible with interest rates at 5.5%? The secret sauce is fiscal policy. The Biden administration has pumped trillions into the economy via the Inflation Reduction Act, the CHIPS Act, and other infrastructure spending. This is Keynesianism on steroids, and it is working. But there is a cost: the US budget deficit is running at 6.3% of GDP, and the national debt has surpassed $35 trillion. Markets are starting to notice. The 10-year Treasury yield has crept above 4.5%, and the yield curve remains inverted, a classic harbinger of recession. The US is effectively borrowing from the future to boost the present. It is a high-stakes gamble.
Now look at the UK. Our fiscal position is the envy of the developed world, at least on paper. The Office for Budget Responsibility projects the deficit will fall to 1.1% of GDP by 2028-29, driven by a combination of tax increases and spending restraint. The Chancellor has stuck to his fiscal rules, and the Debt Management Office has seen strong demand for gilts. The 10-year gilt yield stands at 4.1%, slightly below the US equivalent, reflecting the market’s confidence in UK fiscal discipline. But there is a twist. The UK economy is barely growing. GDP expanded just 0.2% in the second quarter. Business investment is weak, and productivity growth is anaemic. We are paying the price for austerity with a stagnant economy. The labour market, while still tight, is showing signs of cooling. The question is whether the markets will reward our prudence or punish us for stagnation.
The key metric to watch is the inflation outlook. In the US, core PCE inflation has fallen to 2.6%, still above the Fed’s target. The market is pricing in a rate cut in September, but if inflation persists, the Fed may be forced to hold. In the UK, headline CPI is at 2.2%, but services inflation is sticky at 5.6%. The Bank of England has already cut rates once, but the path ahead is fraught. If UK inflation reaccelerates, the Bank will have to pause, and the bond market will revolt. The Chancellor’s fiscal headroom, which was already thin, could evaporate.
What about capital flight? The US is attracting vast sums of foreign investment, driven by tech, AI, and energy. The dollar remains the world’s reserve currency, a privilege that allows the US to run larger deficits without immediate consequences. The UK, by contrast, relies on the kindness of strangers. Our current account deficit is persistent, and we need continuous capital inflows to finance it. If global investors lose faith in UK growth prospects, the pound could weaken, pushing up import prices and reigniting inflation. That is the nightmare scenario for the Treasury.
So who is winning? The US is betting on growth to outrun its debts. It is a bold strategy, but history suggests that high deficits eventually catch up with you, either through higher inflation or a fiscal crisis. The UK is betting on discipline to restore confidence. But discipline without growth is a recipe for stagnation. The optimal path is somewhere in between: a credible fiscal plan that does not crush demand, combined with structural reforms to boost productivity. Unfortunately, that requires the kind of political consensus that is in short supply on either side of the pond.
For now, the market is giving both economies a cautious pass. But the margin for error is shrinking. If the US economy slips into recession, the deficit will explode. If the UK economy fails to revive, the fiscal arithmetic becomes impossible. Investors should watch the bond markets closely. They are the ultimate arbiter of fiscal credibility. And right now, they are sending a clear message: prudence has its rewards, but growth is the only true guarantee.
