The euro rebounded back above parity with the dollar today as the US currency's recent rally ran out of steam.
Investors are waiting to see whether Federal Reserve Chair Jerome Powell would sound a more hawkish tone at a meeting this week.
A more bullish mood across markets also helped the euro, as well as currencies linked to broad investor sentiment such as the Australian dollar, which rallied nearly 1%.
Investors have also been bracing for the Fed to double down on its commitment to crushing inflation at its annual gathering in Jackson Hole, Wyoming, where Powell is due to speak.
The euro/dollar's direction this week has largely been driven by soaring natural gas prices, which are correlated with a weaker euro because of the region's dependence on gas for its energy needs.
Worries about the global economy had sent investors into dollars earlier this week.
The US dollar index, which measures the greenback against six counterparts, eased 0.4% to 108.17, but remained not far from its highest since September 2002 at 109.29, touched in mid-July.
The euro was 0.4% higher at $1.001 after this week hitting a 20-year low below parity.
The Australian dollar rose 1.1% to $0.6983, while the Japanese yen rallied 0.4% and sterling by half a percent.
The stronger Aussie dollar came as China's yuan rebounded from a two-year low, helped by firmer-than-expected official guidance, which traders took as a sign that authorities are becoming increasingly uncomfortable with rapid losses in the currency.
Key data releases today in Europe include the German IFO numbers on the business climate and the release of the minutes of the European Central Bank's July meeting, when it hiked interest rates by 50 basis points.