Half Hourly Exchange Volume Report
 (*All times are Central)
  Equity Index Total Put / Call 
Time     Calls   Puts   Total    Calls  Puts   Total  Calls   Puts    Total  Ratio 
9:00  AM 59727   38504   98231   2988   5191   8179   62715   43695   106410  0.7  
9:30  AM 138066  74400   212466  14399  14761  29160  152465  89161   241626  0.58  
10:00 AM 200281  111576  311857  13873  18143  32016  214154  129719  343873  0.61  
10:30 AM 249266  173585  422851  21356  21440  42796  270622  195025  465647  0.72  
11:00 AM 297373  203925  501298  25702  24459  50161  323075  228384  551459  0.71  
11:30 AM 336797  236392  573189  28120  26461  54581  364917  262853  627770  0.72  
12:00 PM 367496  255937  623433  32486  27982  60468  399982  283919  683901  0.71  
12:30 PM 395396  279122  674518  34134  28745  62879  429530  307867  737397  0.72  
1:00  PM 425287  299715  725002  38681  30257  68938  463968  329972  793940  0.71  
1:30  PM 459043  326027  785070  42252  33632  75884  501295  359659  860954  0.72  
2:00  PM 504750  349301  854051  46917  36003  82920  551667  385304  936971  0.7  
2:30  PM 549389  383435  932824  52172  40050  92222  601561  423485  1025046 0.7  
3:00  PM 614521  420858  1035379 55689  41715  97404  670210  462573  1132783 0.69