Rates were little changed Wednesday in quiet trading. This morning, payroll service provider ADP projected an increase of 217,000 private sector jobs in February, above the consensus forecast of 160,000. Federal Reserve Chairman Ben Bernanke will be delivering a second day of his semi-annual testimony to Congress. The Mortgage Bankers Association weekly purchase activity index fell by 6%, while the refinancing activity index decreased by 7%. Average reported 30-year fixed rates fell to 4.84%, not including fees. The Beige Book, a survey of economic activity by the Fed’s 12 regional banks, will be released at 2:00 PM.