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

Cempra, Inc. (symbol: CEMP) was one of the biggest winners of the trading
day today (2015-10-28), gaining 17.12%. The number of shares that changed
hands was 3,412,645, or about 2.2 times the average daily volume in the
stock.
The closing price was $23.53, amounting to a market cap of $1,030,000,000,
about -49.93% off the highest price in the last 12 months. The stock has
been trading at a range between $12.17 and $46.99.
CEMP is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2012.