I was asked recently by a client to track down a graph which displayed historical data on mortgage rates. After a couple web searches I came across the Mortgage News Daily website which is a great resource for mortgage professionals. Some of the information seems a little technical for consumers but none the less I would recommend to those who want to learn more about residential mortgages.
Here is a link to their home page.
Here is a link to a page where you can look at historical interest rates and get mortgage-backed bond quotes.