ECB needs to expand 'toolkit' - Vice President

(Reuters) - The ECB will need to widen its monetary policy toolkit to ensure it remains effective, the European Central Bank's Vice President Luis De Guindos said on Thursday.In his view, the "toolkit will need to be wider" in the sense that the central bank needs to do more than conventional monetary policy, De Guindos said at BNP Paribas banking conference.The ECB is in the process of reviewing its monetary policy and the tools it uses to keep inflation near 2% and support the euro zone..