People walk past the Bank of Greece headquarters, in central Athens, on Friday, March 6, 2015 . European Central Bank head Mario Draghi said the ECB "stood ready" to once again permit Greek banks to use junk-rated Greek government bonds as collateral to get credit from the ECB. That would happen as soon as the bank assesses that Greece is likely to successfully complete a creditor review of its progress. (AP Photo/Petros Giannakouris) (The Associated Press)
FRANKFURT, Germany – The European Central Bank has launched its 1.1 trillion euro ($1.2 trillion) stimulus program by starting purchases of government bonds.