THe SP futures contract trades pit only from 8:30 in the morning until 3:15 in the afternoon CST. It trades electronically from 3:30 in the afternoon until the pit open the next morning. If the CME were to allow the SP to be listed electronically all the time, what would be the effects on the pit volume and total volume ? What would be the electronic liquidty and b/a size. How would this effect the volumes for the Mini SP ? Would this change increase/decrease the total revenues for the CME and FCM's.?