Mortgage rates moved lower again today, hitting their best levels since July 23rd.  That achievement is mostly a factor of what has been an extremely flat rate environment for the past two weeks followed by a moderate improvements over the past 2 days.  The day was generally drama-free with the Jobless Claims report in the morning arriving in line with expectations and an average Treasury bond auction in the afternoon.  In general, the markets that underly mortgage rates are relatively detached from the day to day minutiae at the moment and prepared for bigger movement in the weeks to come.  Conventional 30yr Fixed best-execution remains at 4.5% and buydowns to 4.25% may make sense for some scenarios.