The European Central Bank, as expected, left interest rates unchanged on Thursday and maintained its commitment to purchasing 20 billion euros ($22.8 billion) a month in bonds. The ECB's deposit rate stands at -0.5%, while its main refinancing operations rate holds at 0%. In a statement, the ECB repeated that its Governing Council expects rates to remain at present or lower levels until there are solid signs stubbornly low inflation is on track to converge with the bank's target of near, but below, 2%. The ECB also reiterated it expects asset purchases to run for as long as needed to underline the accommodative impact of its policy rates, ending them shortly before it starts to raise interest rates. Also as expected, the ECB announced the launch of a review of its monetary policy strategy. ECB President Christine Lagarde is scheduled to hold a news conference at the bank's Frankfurt headquarters at 8:30 a.m. Eastern.