actually we have February, and your report is from 01.01.2014 to 31.01.2014.
the value shown as end value in the report equals to the current value from your material master accounting view.
But your previous period (01/2014) shows 0 stock and 0 value .
I assume that December 2013 is period 01/2014 in your system. And January 2014 is period 02/2014.