Mortgage rates were somewhat distressed, to say the least, after yesterday's various news stories pertaining to the US/China trade deal. For a variety of reasons, that's the biggest consideration for financial markets at the moment, and interest rates are no exception. Rates were pushed to the upper edge of their recent range as the signing of the first phase of the trade deal looked increasingly likely by the end of the week.
While both sides basically acknowledged the progress on the deal (and even the probability that it will be signed), it was not, in fact, actually signed. Additionally, several details still need to be cleared up before that happens.