Mortgage rates were little changed Thursday as mortgage-backed securities prices stabilized for the first time since Monday’s announcement of a tentative agreement between the Obama Administration and Republican leaders to extend tax cuts and unemployment benefits. In economic news, weekly Jobless Claims fell to 421,000, below the consensus forecast of 425,000. Stocks were mixed. Results from today’s 30-year Treasury auction will be released at 1:00 PM. No other key data will be released today.