$IMGN is one of biggest losers #stocks today. read more:

ImmunoGen, Inc. (symbol: IMGN) was one of the worst losers of the trading
day today (2016-04-29), losing -18.93%. The number of shares that changed
hands was 5,302,751, or about 5 times the average daily volume in the stock.
The closing price was $6.85, amounting to a market cap of $596,360,000,
about -64.75% off the highest price in the last 12 months. The stock has
been trading at a range between $6.59 and $19.43.
IMGN is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 1989.