Euro zone business activity grew at its weakest pace in five months in September as curbs to limit the Delta variant of coronavirus hit demand and supply-chain constraints pushed input costs to a more than two-decade high, a survey showed today.

Despite infection rates slowing significantly over the past month, most remaining restrictions are unlikely to be lifted anytime soon in major economies, including Germany and France, on concerns over how Covid might develop in the future.

IHS Markit's Flash Composite Purchasing Managers' Index, a good gauge of overall economic health, fell to a five-month low of 56.1 in September from 59 in August.

Although it stayed above the 50 level separating growth from contraction for the seventh consecutive month, it was well below a Reuters poll estimate of 58.5.

"September's flash PMI highlights an unwelcome combination of sharply slower economic growth and steeply rising prices," said Chris Williamson, chief business economist at IHS Markit, in a statement.

"Growth looks likely to weaken further in coming months if the price and supply headwinds show no signs of abating, especially if accompanied by any rise in virus cases as we head into the autumn," he added.

A sub-index tracking input costs hit 70.5, its highest in more than two decades.

That suggests supply distortions - one of the main drivers of prices throughout the globe over past months - are far from resolved and the trend of higher inflation is here to stay at least for a few months to come.

Indeed, optimism about future output fell to an eight-month low. That contrasts with improving consumer confidence, according to the latest European Commission data.

A PMI covering the bloc's dominant service industry tumbled to 56.3 in September from 59 in August, its lowest since May and significantly below the Reuters poll forecast of 58.5.

New business - a measure that tracks demand in the sector - expanded at its slowest pace in five months.

Also, the manufacturing PMI declined to 58.7 from 61.4 in August, its lowest since February and below the Reuters poll forecast of 60.3. An index measuring output that feeds into the composite PMI fell to 55.6 from 59, the weakest in eight months.

Weakening demand led firms to hire at the slowest pace in six months. Meanwhile, backlogs of work expanded at a robust pace again, signaling worsening supply constraints.