The fluctuations observed during the day:

===================================================================================
                                  Current Session                         Prior Day
           Open    High     Low    Last    Time      Set    Chg       Vol       Set
===================================================================================
May'13   83.50    84.09   83.12   83.48    14:30    83.48     -       6415    83.48
                                         Apr 19
Jul'13   85.48    86.15   85.11   85.36    14:30    85.36    -0.12   13934    85.48
                                         Apr 19
Oct'13   85.48    85.48   85.26   85.26    14:30    85.26     0.35       5    84.91
                                         Apr 19
===================================================================================