Mortgage rates were little changed Wednesday in quiet trading. Investors were mainly watching for progress on a Greek debt deal. Stocks moved lower. The Mortgage Bankers Association weekly purchase activity index rose 0.1% last week, while the refinancing activity index surged by 9.4%. Average reported 30-year fixed rates fell to 4.05%, not including fees. Results from today’s 10-year Treasury auction will be released at 1:00 PM.