"For example, during the mid-2000s, financial conditions failed to tighten even as the Federal Reserve pushed its federal funds rate target up from 1 percent to 5¼ percent. Conversely, at the height of the crisis, financial conditions tightened sharply even as the Federal Reserve aggressively pushed its federal funds rate target down toward zero. As a result, monetary policymakers need to take the evolution of financial conditions into consideration. For example, when financial conditions tighten sharply, this may mean that monetary policy may need to be tightened by less or even loosened. On the other hand, when financial conditions ease—as has been the case recently—this can provide additional impetus for the decision to continue to remove monetary policy accommodation. "
https://www.newyorkfed.org/newsevents/speeches/2017/dud170626
https://www.newyorkfed.org/newsevents/speeches/2017/dud170626