The dollar weakened across the board on Tuesday, as investors shifted their focus away from hawkish remarks on U.S. interest rates by Federal Reserve officials and towards a speech on Friday by Fed Chair Janet Yellen.
The greenback was given a boost over the weekend when Vice Chairman Stanley Fischer said the Fed was getting close to its job and inflation targets, prompting speculation that a rate hike could come as soon as September.
But having hit a five-day high of 94.958 .DXY against a basket of currencies in early trade on Monday, the dollar dipped 0.1 percent to 94.411, taking it close to a two-month low of 94.077 touched last week.
Yellen will speak at the annual meeting of world central bankers in Jackson Hole, Wyoming, at the end of the week.
"Will Yellen deliver anything this Friday?" asked Saxo Bank's head of currency strategy in London, John Hardy. "She has been a very cautious mover since assuming the helm in early 2014."
Investors are anxious to see whether Yellen will echo the hawkish views expressed by Fischer and New York Fed President William Dudley, or take a more subdued stance in line with the July Fed policy meeting minutes, which suggested the central bank was not in a hurry to raise rates.
"There's still a huge amount of scepticism as to whether the Fed really can hike, irrespective of the hawkish remarks we've heard from Fed bankers," said Rabobank currency strategist Jane Foley, from London.
The dollar briefly dipped below 100 yen JPY= in early trade before recovering to 100.165 yen by 1045 GMT, leaving it down 0.2 percent on the day.
The biggest mover among developed-world currencies on Tuesday was the New Zealand dollar, which rose as much as 1 percent to $0.7340 NZD=D4 after Reserve Bank of New Zealand Governor Graeme Wheeler said he did not see the need for a rapid succession of interest rate cuts.
The euro edged up 0.1 percent to $1.1332 EUR=, close to last week's two-month high of $1.1366. Data showed euro zone private business activity was stable in August, albeit at a muted level, alleviating some concerns that Britain's vote to leave the European Union would spill over negatively into the currency bloc.
