The fluctuations observed during the day:

===============================================================================
                                  Current Session                     Prior Day
           Open    High     Low    Last    Time     Set   Chg     Vol       Set
===============================================================================
Mar'13   83.98    84.05   83.40   83.68    14:30   83.68   0.12     34    83.56
                                         March 01
May'13   85.10    85.80   84.13   85.40    14:30   85.40   0.11  24768    85.29
                                         March 01
Jul'13   85.84    86.35   84.94   86.05    14:30   86.05   0.11   5938    85.94
                                         March 01
===============================================================================