The froth has been blown off the American equity market. US stocks slumped on Wednesday, dragged down by a broad sell-off in technology shares, as investors recalibrated their expectations for the sector that has propped up the bull run for the better part of a year. The S&P 500 fell 1.7 per cent, the Nasdaq Composite shed 2.4 per cent, and the Dow Jones Industrial Average gave back 450 points. The culprit? A growing realisation that the AI euphoria may have priced in perfection, leaving little room for error in an environment where central banks are still tightening the screws.
For London, the message is clear: when Wall Street sneezes, the City catches a cold. The FTSE 100, which had been holding up reasonably well thanks to its heavy weighting in defensives and energy, will not escape unscathed. Gilt yields are already creeping higher, with the 10-year benchmark touching 4.35 per cent, as the market reprices the risk of a global slowdown. The pound, meanwhile, is taking a hit, sliding below $1.27, a level that will do little to assuage concerns about imported inflation.
But let’s be honest: this is not a sudden crisis. It is the natural consequence of a market that has been living on borrowed time. Big Tech valuations had become detached from reality, driven by a narrative that artificial intelligence would magically deliver perpetual growth. That fantasy is now colliding with the hard truth of rising real yields and a Federal Reserve that remains hawkish. Jamie Dimon’s warning about “storm clouds” was not a prediction; it was a statement of the obvious.
The real question for London is how deep the contagion will be. The UK economy is already teetering on the edge of recession, with GDP barely growing. The Bank of England has its own inflation problem, and any further tightening will only exacerbate the pain. If the US downturn deepens, capital flight from risk assets will accelerate, and London’s property market and financial sector will feel the sting.
For now, the prudent investor should be looking for exits, not bargains. Cash is a legitimate asset class in this environment. The bottom line: the party is over, and the hangover is just beginning.
