In the language of statistics, the actions are intended to move some of the probability mass from the tail of the distribution of possible outcomes toward the center of the distribution.
But, of course, there's no such thing as a free lunch – what I mean is that here, too, we face a tradeoff: The cost of the risk-management action is the possibility that it may have increased the odds of inflation moving beyond some acceptable range or of economic activity moving significantly away from its longer-run sustainable path.