Mortgage rates were little changed Monday in quiet trading. The market showed little reaction to the passage of a new austerity program by the Greek Parliament. The situation there remains volatile, as Greek citizens rioted in the streets to protest the measures. No key economic data will be released today, but the remainder of the week will be busy. January Retail Sales figures will be released tomorrow, Industrial Production and minutes from last month’s FOMC meeting will come out on Wednesday, the Producer Price Index on Thursday, and the Consumer Price Index on Friday.