One of the ultimate paradoxes of the post-crisis environment is that "bad" news can be "good" news to the extent poor data reinforces the need for monetary accommodation, and vice versa.
This is a well-known phenomenon among market participants and it's readily observable "in the wild" (if you will) during periods when traders are anxious about the prospect of monetary tightening. If policymakers are perceived to be moving too quickly on normalization, cooler-than-expected readings on inflation and, as long as the data isn't too bad, growth, can be a boon to risk assets as traders