Mortgage rates have had a few first world problems to complain about recently. Well, there's really only been one: a relative inability to keep pace with the broader decline in rates as seen in the Treasury market. If Treasuries are the "master," mortgage rates are the proverbial dog on a leash. The dog can pull ahead, heel faithfully, or drag recalcitrantly behind. The latter has been mortgage rates' M.O. for the past few weeks owing to some abstruse loan performance data that made investors rethink the value they were placing on mortgage investments. But now, the broader rate market has done... 
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