The cumulative global impact of seven weeks of war in the Middle East will begin to emerge in the coming week, in a second round of business surveys from multiple countries. 

Whether the twin blows affecting growth and inflation seen in purchasing manager indexes after the first month of the Iran conflict intensified during month two will be a key focus. 

The initial take for April in economies from Australia to the US will be published on April 23. Among those covered by Bloomberg forecasts, indexes in Germany, France, the euro zone and the UK are all anticipated to show broad deterioration, while the American indicators are seen little changed.

Ultimately, the numbers may point to the degree that stagflation is lurking. That ominous term – evoking the noxious mix of surging prices and stalling growth of the 1970s – was cited by Mr Chris Williamson, chief business economist at PMI-compiler S&P Global, when summing up risks highlighted by the overall global measure in March.

The survey numbers follow a week of bleak stock-taking in Washington, where finance chiefs were warned by the International Monetary Fund of a range of potential outcomes that included a near-recession for the world. Notwithstanding the current Middle East ceasefire, the damage to growth and inflation can’t be easily undone.

“Even if the war ends tomorrow, it would take quite some time for the recovery to kick in,” IMF Managing Director Kristalina Georgieva told Bloomberg Television. “The impact is already baked in.”

For all the gloom, multiple policymakers remain cautious about how to respond. European Central Bank chief economi...