In normal times, central banks cut their key rates, and this passes through to the yield curve. However, in order to deal with the financial crisis, the ECB like other central banks have brought their key interest rates to very low levels, around zero. This means that our traditional monetary policy tools had to be supplemented by other instruments, known as non-standard instruments, in order to reach our prices stability objective. I will return to this point later. b) The second challenge, which stems from the first, is the risk of an unanchoring of expectations, which would make it harder for us to achieve our 2% target again. Indeed, if inflation stayed too low for too long, economic agents may revise downwards their inflation expectations, which would create second round effects. Lower inflation expectations influence economic agents’ price- and wage-setting behaviour, which in turn keeps inflation low. It can even raise the risk of deflation, defined as a cumulative process of falling prices, including those of assets, or even wages and production, as the world economy experienced in the 1930s or Japan partially underwent in the 1990s. Such deflationary dynamics are not at play today; but that is why our inflation target is symmetrical. We consider too low inflation to be just as costly as too high inflation. And, therefore, it is more risky for central banks to act too late than too early. Since the start of the year, we have observed that market-based measures of inflation expectations have fallen.
At European level, we need to move finally towards a true economic union, in addition to the monetary union embodied in the Eurosystem. Only by optimising the governance of the euro area can we optimise growth. The current extremely accommodative monetary policy stance creates the ideal conditions for carrying out much-needed reforms. It should not be used instead as an excuse for putting them off: Europe and France urgently need to make the most of this opportunity, right now. Thank you for your attention. 4  BIS central bankers’ speeches