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

TESARO, Inc. (symbol: TSRO) was one of the biggest winners of the trading
day today (2016-06-29), gaining 108.01%. The number of shares that changed
hands was 19,083,073, or about 32.1 times the average daily volume in the
stock.
The closing price was $77.4, amounting to a market cap of $3,550,000,000,
about -4.08% off the highest price in the last 12 months. The stock has
been trading at a range between $29.51 and $80.69.
TSRO is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2012.