New Biotech Pair Trade: Infinity Pharma Over ImmunoGen By: Benzinga via Benzinga September 21, 2015 at 10:41 AM EDT Infinity Pharmaceuticals Inc (NASDAQ: INFI) shares are down nearly 45 percent year-to-date, while Immunogen, Inc (NASDAQ: IMGN) ... Read More >> Related Stocks: AbbVie Immunogen Inc Infinity Pharmaceuticals