The European Central Bank (ECB) kept its key eurozone interest rates unchanged at its monetary policy meeting on Thursday. The main refinancing operations rate, which provides liquidity to the banking system, stands at 4.5%. The ECB’s deposit rate, which credit institutions receive when they park money at the bank, stands at a record-high 4%. This is the fourth time in a row that the ECB has left key interest rates in the 20-country currency area unchanged. The policy meeting scheduled for June 6 could bring a change of course, ECB President Christine Lagarde hinted following Thursday’s sessio…