What the graft nicely demonstrates is the effect of the Jan 2012 "convertible notes"...The enormous leap in the the short interest in Jan 2012 resulted from the convertible hedge which virtually all the big guys who had access to these notes did. Once you bought the note...which offered 3.5% interest rate, the prudent thing to do was to short a number of shares equal to the number of convertible notes you purchased. That guaranteed you a market neutral position on the notes...ie. if the PPS dropped then your short covered the loss on the principle so you were getting 3.5% back risk free and half your money back on the short sale...
So to large degree a large amount of Amarin's ahort position is artificial...The debris of the convertible notes..
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