To get daily market information, please use the following links.  These sites report on the most widely known markets and instruments having a significant affect on the interest rates that lenders charge for mortgage loans.  To learn more about how and why mortgage rates fluctuate, please read the article from HSH Associates.  For information on two additional indices that are cost driven (like COFI), not market driven, and are therefore more stable than market indices, please email your daytime telephone number and your request to indices@greatchoicemortgage.com.