The odds of a US recession by next year have increased sharply, with mounting protectionism continuing to pose the greatest economic threat, according to a business economic survey on Monday.

Nearly all the respondents to the quarterly survey from the National Association for Business Economics predicted growth would slow this year but were moderately less gloomy about the risks to their outlook.

However, the poll of 53 economic forecasters from major US corporations and universities was conducted in the first half of May, just as US trade relations with China took a sudden turn for the worse but before US President Donald Trump’s latest threat to impose new tariffs on Mexico in a dispute over migration starting at five per cent and quickly increasing to 25 per cent.

“Increased trade protectionism is considered the primary downside risk to growth by a majority of respondents, followed by financial market strains and a global growth slowdown,” Gregory Daco of Oxford Economics, who chaired the survey, said in the report.

“Recession risks are perceived to be low in the near term but to rise rapidly in 2020.”

The panellists put the odds at 60 per cent for a US recession before the end of next year – nearly double the 35 per cent forecast in the survey three months ago.

Nearly 90 per cent of respondents said they had cut their growth forecasts in recent months due to US trade policy, which has involved battles with all major US trading partners, but even so the overall consensus for this year and next are a bit higher than the last survey.

Panellists now expect GDP growth to fall to 2.6 per cent this year and 2.1 per cent by next year, from 2.9 per cent at the end of last year.

Most, or 60 per cent, said the balance of risks was weighted to the downside but this was down from 74 per cent in the previous survey.