The fluctuations observed during the day:

===============================================================================
                                  Current Session                     Prior Day
           Open    High     Low    Last    Time     Set     Chg     Vol     Set
===============================================================================
Dec'12   70.34    70.75   69.80   70.21   14:30   70.21      0.14  25386  70.07
                                         November 01
Mar'13   71.67    71.98   71.00   71.50   14:30   71.50      0.11  11653  71.39
                                         November 01
May'13   72.97    72.97   72.20   72.74   14:30   72.74      0.17  1145   72.57
                                         November 01
===============================================================================