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

Cerus Corporation (symbol: CERS) was one of the biggest winners of the
trading day today (2015-09-04), gaining 6.29%. The number of shares that
changed hands was 949,865, or about 1.2 times the average daily volume in
the stock.
The closing price was $5.24, amounting to a market cap of $507,110,000,
about -25.46% off the highest price in the last 12 months. The stock has
been trading at a range between $3.6 and $7.03.
CERS is in the Medical/Dental Instruments industry, part of the Health Care
sector. It first went public in 1997.