Is there a theoretical bottom to how low rates can go?Manufactoring and retail have a theoretical bottom, based on cost to make/deliver a product. Any similar "bottom line" to mortgage rates?August 11 2011 - Black Mountain Ranch00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.