The US dollar wallowed near a four-week low on Tuesday as traders waited with bated breath for the outcome of the Federal Reserve's two-day policy meeting at which it's expected to announce a modest reduction in its bond-buying stimulus.
The dollar was little changed versus a basket of currencies at 81.312, after having set a four-week low of 80.968 the previous day.
The greenback had retreated on Monday after Lawrence Summers' withdrawal from the race to lead the Federal Reserve reduced expectations of a faster pace of monetary policy tightening by the US central bank.
The decision by the former US Treasury secretary - who is regarded by investors as relatively hawkish - left Federal Reserve Vice Chair Janet Yellen as the front-runner. Traders said the Fed is likely to continue a slow, cautious approach to tightening policy if Yellen is named to replace current Chairman Ben Bernanke.
That had added to pressure versus the dollar, which has struggled recently as disappointing economic data led to market expectations that the Fed would reduce its $85 billion monthly bond-buying stimulus by only a modest $10 billion after its two-day policy meeting starting on Tuesday.
Still, with the Fed looking set to take its first, albeit small, step to wind back its stimulus, investors will be focusing on the Fed's guidance on its future policy stance.
"On top of the size of tapering, what's more important this time is the Fed's forecast of interest rates in 2016, which will give markets an idea on the pace of future rate hikes," said Sho Aoyama, senior market analyst at Mizuho Securities.
Analysts say rate hike expectations hold the key because of their impact on short-term US bond yields and thereby the dollar's yield attraction.
A faster pace of rate increases would make the dollar more attractive given that many other central banks, such as the European Central Bank and the Bank of Japan, are perceived to be nowhere near tightening.
"Lots to look for, and there are so many possible combinations, it's hard to predict in advance," said Gareth Berry, Singapore-based G10 FX strategist for UBS, referring to how the dollar might