Rates were little changed Wednesday with no key economic data scheduled for release. The Mortgage Bankers Association weekly purchase activity index rose by 2.4%, while the refinancing activity index fell by 1.6%, despite lower interest rates. The average reported 30-year fixed rate for the week ending 9/27 fell to 4.38%, excluding fees. Results of today’s 7-year Treasury auction will be released at 1:00 PM.