Operator
Operator
Good day everyone and welcome to today's CBOE Holdings Fourth Quarter 2011 Earnings Conference Call. At this time, all participants are on a listen-only mode. Later we’ll conduct a question and answer session and instructions will be given at that time. [Operator Instructions] As a reminder, today’s call is being recorded. At this time, for opening introductions, I would like to turn the call over to Debbie Koopman, Director of Investor Relations.