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

Amphastar Pharmaceuticals, Inc. (symbol: AMPH) was one of the biggest
winners of the trading day today (2015-09-01), gaining 3.19%. The number of
shares that changed hands was 285,027, or about 0.9 times the average daily
volume in the stock.
The closing price was $13.28, amounting to a market cap of $602,080,000,
about -27.43% off the highest price in the last 12 months. The stock has
been trading at a range between $9.76 and $18.3.
AMPH is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2014.