Rates inched higher Monday as progress was reported in negotiations over Greek debt. Greece has made concessions on pension reforms to help meet the demands of its creditors. While much work remains, the progress caused investors to shift to riskier assets, hurting mortgage-backed securities. In economic news, Existing Home Sales jumped 5.1% to 5.35 million annual units, beating forecast, to the highest level since November 2009. No other key data will be released today.