Furthermore reinforcing his silence as approval was that he was the person who initiated the investigation vocally in the first place. He was vocal and public about that, he is vocal and public about every holding that he sells. He has yet to sell his shares in this company = approval.
He buys when he perceives the reward is greater than risk.
He sells when he perceives the reward is not greater than risk.
He has not sold NWBO therefore he perceives the reward is greater than the risk.
I also perceive the reward to be greater than the risk and that is why I am not selling now.
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