Commodity-linked currencies including the Australian dollar , the New Zealand dollar and the Canadian dollar eased slightly against the US dollar, tracking weakness in commodity prices.
The dollar index held steady overnight then rose as European markets opened, before slipping to 91.807 at 1237 GMT, down by less than 0.1%.
Markets are in this flux period where they're gripping on to marginal bits of information, but there's nothing to define a new broad dollar trend until we get some more colour from the Federal Reserve tomorrow.
The euro weakened 0.2% to $1.1926 after rising last week for the first time in three weeks as latest data showed hedge funds slashed their net euro positions.
Gains in the greenback were more pronounced against low-yielding currencies such as the euro and the British pound while high-yielding currencies like the Australian dollar fared relatively better.
Monday's trading theme is a continuation of the pattern we have seen in March and we have to see what the Fed does later this week to see if the rise in bond yields and dollar strength versus low yielders can carry on.
In Tokyo, e-commerce giant Rakuten skyrocketed 20.72 percent to a day-time upper limit of 1,503 yen and Japan Post gained 1.95 percent to 1,045.5 yen after the companies confirmed reports that the two firms agreed to form a capital alliance.
US President Joe Biden signed a $1.9 trillion stimulus bill into law on Thursday and urged US states to make all adults eligible for a coronavirus vaccine by May 1.
Policymakers have also expressed concern about strength in the euro, although a recent weakening of the currency has lowered expectations about major policy changes.
The Bank of Canada on Wednesday left its key overnight interest rate unchanged at 0.25%, as expected, and said the Canadian economy was proving to be more resilient than anticipated to the second COVID wave and containment measures.