The European Central Bank would only stop the asset buying program when there are more signs of inflation picking up towards target. That's the word Reuters cited on Wednesday from two ECB top officials.

ECB President Mario Draghi said the bank is confident with current pace of price growth, but it does need further evidence to support a decision to end bond buys. Existing data showed consumer prices in the region are likely to fail the 2-percent target for years to come. Draghi also said net asset purchases remain necessary for now. Draghi noted US trade restrictions may cause uncertainty, but initial estimates suggest the near-term impact on Europe would be small. ECB's 2.55 trillion euro bond buying program was launched three years ago to revive inflation, and it is due to expire this September.