 GREENWICH, Conn.--BUSINESS WIRE--- IBKR Earnings--Interactive Brokers Group, Inc. Nasdaq: IBKR announces that its Chairman Thomas Peterffy will speak at Nasdaqs International Investor Conference on Thursday, December 2nd at 11:00 a.m. ET4:00 p.m. GMT. Mr. Peterffys presentation can be heard live via webcast on the Internet accessible from the companys web site, Participants should log in approximately 10 minutes prior to the start of the presentation. A replay will also be 