COPENHAGEN (Reuters) – Denmark’s central bank raised its key interest rate by 0.5 percentage points to minus 0.1% on Thursday, following a rate hike earlier in the day by the European Central Bank. “The interest rate increase is a consequence of the increase by the European Central Bank of its main monetary policy rate,” the central bank said in a statement. The monetary policy spread to the eurozone will remain unchanged, it added. Unlike most central banks, Denmark does not adjust rates to control inflation. Its sole mandate is to keep the crown currency within a narrow exchange rate band ag…