The yen surged against the dollar after US jobs data, after earlier speculation in markets that authorities could intervene again on the currency.

The US’s decision to sell euros to support Japan’s currency without warning European policymakers is adding to geopolitical risks and further dimming the appeal of longer-maturity government bonds, according to BlackRock Inc.

The yen surged against a weaker dollar after an unexpectedly soft US payrolls report on Friday, with traders on alert for any sign authorities were preparing to intervene in the Japanese currency again.