Well nic, that reply was quite prophetic. There is an explanation in this Weekend Australian's Margin Call by Yoni Bashan. The article centres around the relationship between GC1 and Sequoia including some personalities. Anyhow, it explains the where,how and why of the transactions during the bulk of the buyback.
GC1 Price at posting:
51.5¢ Sentiment: Hold Disclosure: Held
A personalised tool to help users track selected stocks. Delivering real-time notifications on price updates, announcements, and performance stats on each to help make informed investment decisions.
(20min delay)