When the price of Mortgage Backed Securities (MBS) on the above chart above goes up mortgage rates come down. When the price goes down mortgage rates go up.
The chart above was posted at 10:51 am est. At that time MBS were unchanged from yesterdays close.
Below is the news when it happened and market reaction. All of the times below are Eastern Standard Time
10:48 AM New Rates have been posted http://www.johnmarbury.com/page5.html/