The fluctuations observed during the day:

===============================================================================
                                  Current Session                     Prior Day
           Open    High     Low    Last    Time     Set     Chg     Vol     Set
===============================================================================
Oct'12    72.62   72.96   71.67   72.71   14:30   72.71     1.12    26    71.59
                                         Aug 15
Dec'12    73.30   73.69   72.13   73.11   14:30   73.11     1.02   9566   72.09
                                         Aug 15
Mar'13    73.04   74.31   73.04   73.98   14:30   73.98     0.95   1794   73.03
                                         Aug 15
===============================================================================