Been following and investing/trading IMGN for a long time. Price has declined from over $20 to under $17 is a few days on nothing new, they just have a large short position that beats the price down every few months, usually right after a quarterly cc. Great technology, interesting pipeline and partnerships, iffy executive management. IMO, not advice, do your own DD. Also buying MXWL, not a biotech, but interesting technology.