In order to unify the operational trading procedures for the GTS electronic trading system, BM&FBOVESPA will change the daily pre-opening period for all Exchange contracts on July 1, 2010, which from that date forward will take place daily from 8:55 a.m. to 9:00 a.m. The Exchange will also introduce a pre-opening session for all of its mini contracts.
The system rules will remain unchanged, and they can be found at the Exchange Website, under Rules, Derivatives, Trading Rules, Electronic System Rules. Click here.