Meaning and limits. Immediate positive effects. Three words that sum up the result of the decisions adopted almost unanimously last week by the ECB on the purchase of treasury bonds from eurozone countries in response to the excessive interest rates set by the markets. When I speak of immediate effects, I am not only referring to reactions to the ECB's decision, but also - and especially - to the behaviour of the markets. Here is just one example - Spain, which previously had to put up with...