The ECB has made it clear it will do its part and the severity of the recession argues for earlier action. But a still-elusive political deal on European Union-wide fiscal support strengthens the case for patience. — Reuters pic

FRANKFURT, June 4 — The European Central Bank (ECB) is certain to give the ailing euro zone economy another shot in the arm and the only question is the timing, with arguments split between a move today and holding out until July.