Interesting that share price has appreciated with substantial volume, but was preceded by big increase in short interest. I wonder if this is some technical issue related to the big volume spike for the Russell funds re-alignment. Other stocks that also had big volume spikes at Russell re-alignment have spikes in short interest too (ARWR, SGMO). Is this the market makers going short to sell to the funds.

 

6/29/2018	2,891,777	716,059	4.038462
6/15/2018	759,060	226,750	3.347563
5/31/2018	636,280	106,304	5.985476
5/15/2018	678,284	174,236	3.892904
4/30/2018	692,454	152,813	4.531381
4/13/2018	712,693	157,041	4.538261
3/29/2018	638,643	262,530	2.432648
3/15/2018	664,936	140,047	4.747949
2/28/2018	800,830	105,655	7.579670
2/15/2018	857,400	233,111	3.678076