widman4. You dont need to calculate. Insiders sold 870k shares in the last 2 days. It is all reported in day insider reports at tsx:

http://www.tmxmoney.com/HttpController?GetPage=SearchInsiderTrade&Language=en&Submit=Submit&QuerySymbol=tam&x=0&y=0

 

I check it every day. This information is not in http://canadianinsider.com/ Maybe later it will be there and we will know who was the big seller and who was the big buyer. But i agree all this stinks.