In that circumstance, deviating from the path would risk market instability, and concerns about such dynamic responses would complicate already difficult policy choices. To be sure, over time, market participants might learn how little weight they should give any published average of "appropriate" policies, but the learning process could take time and be costly, and we would not be assured of a successful outcome.
Recent FOMC communication Communication in a period of market turmoil as we have experienced in the past several months poses special challenges. The situation has been changing rapidly, taking unexpected twists and turns.