The primary activity of the ECB is to maintain stable prices in the euro area. She conducts her activities in such a way that her clients can buy for their current monetary value what they cannot today. The ECB contributes to the security and soundness of the European banking system, while helping to keep all money safe in the banking system. The ECB keeps prices stable by ensuring that inflation - the rate at which total prices of goods and services change over time - remains low, stable and predictable. Therefore, the ECB targets an inflation rate of 2% in the medium term. Its commitment to this goal is symmetrical: it views inflation too low as negatively as inflation. The monetary policy instruments applied by the ECB are very effective. In order to keep prices stable, it need s the right tools at hand. Its interest rates are one of several instruments it uses for its monetary policy. From its inception until today, the Central European Bank, due to the present risk to price stability, has acted with some caution. Its effort is to keep current inflation from turning into constant pressure in the Eurozone. In any case, it is clear that EMU is facing difficult challenges, because, with the introduction of the euro, it has begun to pursue a common economic monetary policy as a whole.