The reality is that Powell used softer more measured and 'pleasing' language. However, the 38 page full text of the Feds Financial Stability report of 28th Nov 2018, contains a rather worrying situation that was in need of 'monitoring'. Lovely language - isn't it? ;)
Powell actually pointed to the "Bottom Line: Financial Stability Risks Are Moderate". It's all in the 'choice of words'.
So - beware of crowds and what you pick up on the news.