Mortgage rates didn't move much today. Some lenders were perfectly unchanged, but the average lender was just slightly higher. That's at odds with underlying bond market movement (which directly impacts rates)--at least at first glance. Specifically, the bonds underlying mortgages were slightly stronger today. That would imply slightly lower mortgage rates. So why did rates rise?
As is often the case, today's seemingly paradoxical movement is due to timing. Bonds were weakening ever-so-slightly yesterday--something that's consistent with lenders raising rates. But the bond market didn't weaken enough for lenders to make those changes in the middle of the business day. Additionally, today's bond market improvement didn't really stick until the afternoon. Like yesterday, it wasn't quite enough to compel lenders to make mid-day rate changes.
All of the above is splitting hairs. In the bigger picture, rates have been flat since last Thursday, and are generally holding just slightly under their highest levels since early 2011. The next potential flashpoint is tomorrow's release of the Minutes from the most recent Fed meeting. These don't offer any new policy updates, but they do give investors a chance to examine the Fed's conversation leading up to the rate hike 3 weeks ago. Occasionally, there are clues about future policy decisions in the Minutes. In those cases, there can be a volatile reaction in rates.