The dollar rose on Monday, a day before the Federal Reserve was due to begin a two-day policy meeting, while the euro was boosted by unexpectedly high inflation data before the European Central Bank meets on Thursday.
The U.S. central bank is widely expected to hike interest rates by an additional 25 basis points this week, and investors will be watching for any new indications on how many more rate increases are likely.
Fed Chair Jerome Powell is in a "difficult position" because "they're going to raise rates 25 basis points and yet he's going to have to argue against the easing of financial conditions," said Marc Chandler, chief market strategist at Bannockburn Global Forex in New York.
Fed funds futures traders are pricing for the Fed's benchmark rate to peak at 4.94% in June, up from 4.33% now, and then for the central bank to cut it to 4.53% by December. This contrasts with comments from Fed officials, who have said that they will need to keep rates in restrictive territory for a period of time in order to bring down inflation.
The disparity comes in part as traders speculate that a weakening economy, and possible recession, will cause the Fed to pivot to a more dovish policy.
The dollar index has weakened to 102.27 from a 20-year high of 114.78 on Sept. 28 as investors price in the likelihood that the Fed is nearing the end of its tightening cycle. But it has been largely rangebound for the past few weeks as it hits technical support against major currencies including the euro.
The question now is "does the dollar bounce or is this a nesting pattern before the next leg down," Chandler said.
Stronger economic momentum may be needed in order to boost the greenback, strategists at TD Securities said in a report, adding that "a catalyst for reversal will need to come from much stronger data."
"EUR has front-run growth conditions (which have invariably improved) but markets may need something more to fade," they said.
The euro fell 0.22% to $1.0844, erasing earlier gains after Spain's consumer prices rose 5.8% on a year-on-year basis in January, the first increase in six months.
"Today's data will underline expectations for a 50-basis-point hike from the ECB on Thursday and also signal that rates will be moved further up," said Niels Christensen, chief analyst at Nordea.
The dollar rose 0.57% against the Japanese yen to 130.53 .
A panel of academics and business executives on Monday urged the Bank of Japan (BOJ) to make its 2% inflation target a long-term goal instead of one that must be met as soon as possible, in light of the rising cost of prolonged monetary easing.
The Australian dollar fell 0.75% to $0.7056 but was on track for a monthly gain of around 3.5% after Australia's inflation rate shot to a 33-year high last quarter, causing traders to ramp up bets that the Reserve Bank of Australia will have to tighten interest rates further.
Sterling dipped 0.43% to $1.2345 ahead of the Bank of England's meeting on Thursday. The BoE and ECB are both expected to raise rates by 50 basis points each this week.