S&P Global's Chris Williamson described the numbers as "worrying" as the euro zone's flash composite PMI dropped to 50.3 in June.
"Eurozone business output growth came close to stalling in June, according to the latest HCOB flash PMI survey data produced by S&P Global, pointing to renewed weakness in the economy after the brief growth revival recorded in the spring," S&P Global said in a release. On a country-by-country basis, data earlier in the day from Germany also showed a slowdown in Europe's largest economy. The German flash composite PMIs fell to 50.8 in June from 53.9 in May. This was below market expectations.