For that reason, in a context of prolonged low inflation, monetary policy cannot be relaxed about a succession of supply shocks. Adopting a wait-and-see attitude and extending the policy horizon brings with it risks: namely a lasting de-anchoring of expectations leading to persistently weaker inflation. And if that were to happen, we would need a much more accommodative monetary policy to reverse it.
Seen from that perspective, the risks of acting too late outweigh the risks of acting too early. In sum, even when faced with protracted global shocks, it is still monetary policy that determines medium-term price stability. If we do not “surrender” to low inflation – and we certainly do not – in the steady state it will return to levels consistent with our objective.