Asian markets mostly fell Thursday as chances of a pre-election stimulus package from Washington dimmed, while investors were also spooked by warnings from US officials that Russia and Iran had tried to interfere in the vote.
With the presidential vote less than two weeks away, investors are stepping back from putting any new bets on a deal despite recent optimism and Donald Trump's call for the two sides to hammer out a massive rescue package.
The deadlock comes as the need for help for struggling Americans is laid bare by a surge in new cases across the US that observers fear could hammer the world's top economy.
The White House has said it will agree to a $1.9 trillion bill but that is $300 billion short of what Democrats have put forward - and even more than many congressional Republicans are willing to swallow.
Still, the two sides continue to talk.
"I don't think our chances get better after the election. I do think the next 24 to 48 hours will tell us a whole lot," White House chief of staff Mark Meadows said on Fox News.
Democratic House Speaker Nancy Pelosi spoke again late Wednesday with Treasury Secretary Steven Mnuchin, and the session "brings us closer to being able to put pen to paper to write legislation", Pelosi spokesman Drew Hammill said.
But analysts do not expect anything to happen in the near future.
"We don't see a stimulus package passed before the election," Wells Fargo Securities LLC strategist Anna Han told Bloomberg TV.
"We still think the recovery will proceed and in three to six months you're going to see that sequentially improving narrative and that's going to help earnings growth going forward."
Wall Street's three main indexes ended lower, and Asia followed.
Tokyo dropped 0.7%, Sydney and Mumbai each fell 0.3%, and Shanghai shed 0.4%. Seoul, Singapore, Jakarta and Wellington were also well in the red.
However, Hong Kong, Taipei, Bangkok and Manila posted gains.
London, Paris and Frankfurt all fell at the open.
While expectations of a stimulus deal are evaporating, traders remain broadly upbeat in the medium term as polls suggest Joe Biden and the Democrats could sweep the presidency and both houses of Congress on November 3, which many feel could lead to an even bigger package.
"The ebb and flow of the stimulus debate around a near-term package appears to matter less to investors as what is essential for market concerns is what different election outcomes mean for stimulus prospects in 2021," said Axi economist Stephen Innes.
Analysts said markets were jolted after US Director of National Intelligence John Ratcliffe accused Russia and Iran of meddling in the election, sending "spoofed" emails to Americans "designed to intimidate voters, incite social unrest, and damage President Trump".
The claims will likely lead to fresh concerns about the result being contested, which could drag out for weeks and cause uncertainty on markets.
The pound held up against the dollar after rallying Wednesday on news that Britain and the European Union will resume post-Brexit trade talks following a week of brinkmanship.
London had been refusing since Friday to restart negotiations after EU leaders said the previous day that it must compromise on outstanding issues including fishing rights.
Prime Minister Boris Johnson had signalled he is ready to abandon the process, which would be economically painful for both sides even without Covid's impact, but after talks between mediators, his office said there was now a basis to get back to the table.
Earlier, EU negotiator Michel Barnier told the European Parliament in Brussels that an agreement was "within our grasp".