The fluctuations observed during the day:

=================================================================================
                                  Current Session                       Prior Day
           Open    High     Low    Last    Time      Set   Chg      Vol       Set
=================================================================================
May'13   84.33    84.36   82.54   82.68    14:30    82.68  -1.65    2587    84.33
                                         Apr 23
Jul'13   86.00    86.25   84.85   85.10    14:30    85.10  -1.05   10478    86.15
                                         Apr 23
Oct'13     -      85.08   85.08   85.08    14:30    85.08  -1.05      -     86.13
                                         Apr 23
=================================================================================