Insider trading alert

To date, Yoda has not seen any official release of the promised “vigorous cost structure review”.
But stories in the market about how all but one or two have survived the cull. And this supposedly happened end of last month! That means a big big chunk removed from the cost base.
So, why no official announcement?
Trades in CGA so far this month- how much was uninformed trading, how much was informed trading?
Surely, those who know the outcome of the “vigorous cost structure review” cannot trade in CGA until the review results are made public. But this is Contango after all?