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Price stability is the main focus of central bankers.
The ECB already sees inflation increasing only modestly in the next two years. Staff projections put it at 1.3 percent next year. While the 2015 inflation forecast will be published only in December, an ECB policymaker said the central bank sees inflation below 1.5 percent in that year, too.
Euro strength could cut price pressures further to levels at which deflation could become a concern.
"This might push inflation to below 1 percent and should set off alarm bells," OP-Pohjola economist Reijo Heiskanen said. "There are some who question whether there is a case for further easing with the economy recovering, but with the increasing uncertainty, I see there is one."
JP Morgan calculates a 10 percent currency shock crimps GDP by 1 percent, with most of this felt within two years, and that the annual inflation rate is lowered by 0.3 percentage points for two years.
The ECB said in July it expected to keep rates at current or lower levels for an extended period of time, maintaining a downward bias. Despite this 'forward guidance', few investors have believed that another rate cut could be in the works. But their thinking is changing.
Last time, when analysts expected the ECB to hold rates, Draghi said the Council discussed a rate cut before holding fire. It will surely do so again.