America’s expansion is now the longest on record

AROUND THENBER world investors, businesses and central bankers are grappling with a startling fact: at the end of July America’s economy will have been growing for 121 months, the longest run since records began in 1854, according to the , a research body. History suggests there will be a recession soon. And plenty of people are gloomy. Bond markets have been sounding the alarm, as long-term interest rates sink below short-term ones, often a harbinger of a downturn. Manufacturing firms are wary; indices of business confidence are tumbling. Yet equity investors are still buoyant. The stockmarket is going gangbusters, rising by 19% so far this year. And in June America’s economy created a whopping 224,000 new jobs, more than twice as many as needed to keep up with the growth of the workforce. The result is a puzzle that matters a great deal. America’s economy accounts for a quarter of global output, so if it stumbles the world will, too. But if it proves able to extend the cycle a lot longer, it may be time to rewrite the rules for how all rich economies behave.The conflicting signals reflect an unusually sluggish and stretched expansion. Some of that is to be expected after the worst financial crisis in 80 years, but as our briefing explains, it is also owing to deeper changes in America’s $21trn economy. Growth is slow but more stable as activity has shifted to services and intangible assets. Thanks to new regulations and the recent memory of the bust, there are few signs of wild mortgage lending, over-investment or reckless financial firms. Inflation is remarkably subdued. These forces mean that a placid expansion can continue well beyond historical norms, but also suggest that the way it will eventually end will be different. Recessions used to be triggered by housing bubbles, price surges or industrial busts. Now you should worry about globally interconnected firms, a financial system addicted to cheap money and a political system that is toying with extreme policies because living standards are not rising fast enough.