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

TESARO, Inc. (symbol: TSRO) was one of the worst losers of the trading day
today (2016-06-28), losing -8.37%. The number of shares that changed hands
was 1,300,926, or about 2 times the average daily volume in the stock.
The closing price was $37.21, amounting to a market cap of $1,710,000,000,
about -44.42% off the highest price in the last 12 months. The stock has
been trading at a range between $29.51 and $66.95.
TSRO is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2012.