Mortgage rates inched lower Tuesday as Existing Home Sales declined for the third straight month in February. In testimony before the House Financial Services Committee, Treasury Secretary Timothy Geithner called for an overhaul of the housing finance system. Congress is considering what to do about Fannie Mae and Freddie Mac in response to the taxpayer bailouts of the two agencies. “Private gains can no longer be supported by the umbrella of public protection, capital standards must be higher and excessive risk-taking must be appropriately restrained” said Geithner. No other economic data will be released today. The Treasury will announce the results of its auction of 2-year notes at 1:00 PM.