The fluctuations observed during the day:

=============================================================================
                                Current Session                     Prior Day
           Open    High     Low    Last    Time     Set     Chg     Vol   Set
=============================================================================
Oct'12    70.38    71.99   70.35  70.73   14:30    70.73   0.05   76 70.   68
                                        Jul 27
Dec'12    71.36    72.91   70.82  71.45   14:30    71.45   0.06   13642 71.39
                                        Jul 27
Mar'13    71.90    73.64   71.75  72.15   14:30    72.15  -0.02    1199 72.17
                                        Jul 27
=============================================================================