"The busiest event week in decades gets started with a weaker dollar," said analyst Kathleen Brooks at online trading site Forex.com.
"Market angst is likely to reach fever pitch this week as we lead up to no less than five central bank meetings, mid-term elections in the US and a non-farm payroll report on Friday.
"A week packed full of so much event risk is a rare thing in the financial markets, and the dollar has started as it left off on Friday -- trading with an air of nervousness," Brooks added.
The dollar plunged to 80.22 yen in Asian trade, nearing its lowest level since World War II, as US data bolstered expectations of further credit easing, dealers said. . Click Here for more info.