Immunogen (NASDAQ: IMGN) December call option implied volatility is at 106, January is at 112; compared to its 52-week range of 50 to 217 into AbbVie (ABBV) to acquire ImmunoGen for $31.26 per share in cash. Call put ratio 22 calls to 1 put with focus on December 17 and January 21 calls into the bell.