I understand it is very costly at the moment to short shares of RVX as the coat of borrowing them is high. Limited available float? Inside information about progress ? Who knows.  But those of us who hold shares in an open account in Canada may  be able to make some money lending our shares to the correct broker.  Only a few in Canada share the interest collected with the individual who loaned the shares In  the first place.

Mind you I know just enough about shorting shares to be dangerous.  Do your own due diligence.   GLTA