So many questions have been raised by the surprising state of affairs in the world of mortgage rates this year. Why did rates move in the opposite direction from broad-based expectations to start the year? Why have rates continued to hold their low ground in such a stable way? Why have rates been able to push to year-over-year lows despite ever-stronger economic data? Why do we now seem ‘stuck’ at those lows while Treasury yields have continued to fall? And most importantly, how long will this relatively favorable environment stick around?