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

Arena Pharmaceuticals, Inc. (symbol: ARNA) was one of the biggest winners
of the trading day today (2015-11-30), gaining 11.16%. The number of shares
that changed hands was 3,817,336, or about 1.2 times the average daily
volume in the stock.
The closing price was $2.39, amounting to a market cap of $579,690,000,
about -61.94% off the highest price in the last 12 months. The stock has
been trading at a range between $1.6 and $6.28.
ARNA is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2000.