"Ultimately, I think the ECB will be aggressive and that divergence in policy with the United States must imply a weaker euro," Chris Scicluna, head of economic research at Daiwa Capital Markets in London, told Reuters. "The question now is how far can we go, and as the Fed tightens, euro/dollar parity is looking likely by the second quarter of next year."
The UK's FTSE 100 Index rose 0.9 percent, France's CAC 40 Index advanced 1.1 percent, while Germany's DAX Index climbed 1.4 percent.
Helping drive gains in equities were shares of miners including Glencore and Anglo American amid reports that China's government is preparing to boost its strategic reserves of nickel, zinc, and aluminium in an effort to bolster depressed prices. China is the world's largest consumer of base metals.
China's largest copper and nickel suppliers plan to meet this week to weigh their response to the lowest prices in years, Bloomberg reported, citing unnamed people with knowledge of the matter. The London Metal Exchange's index of six industrial metals is on track for its largest annual drop since 2008.
Copper rallied more than 4 percent, zinc added more than 2 percent, while aluminium rose the most since early October.
"We believe metals have bottomed out," John Meyer, an analyst at SP Angel in London, told Bloomberg. "We are optimistic for a restart of infrastructure projects in China and the benefits of fiscal improvements feeding through. We're looking forward to some recovery next year."