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The ECB has not discussed reducing the pace of its monthly bond buying, a central bank media officer tweeted late on Tuesday. That was a response to a Bloomberg article that cited sources as saying the central bank would probably wind down its bond buying gradually before ending quantitative easing.
Germany's 10-year Bund yield rose 4 basis points to minus 0.040 percent, its highest level in two weeks.
Across the euro zone, 10-year yields were 4-8 bps higher on the day with Dutch, Finnish, Spanish and Italian yields also hitting their highest levels in around two weeks.