$CPHD is one of biggest losers #stocks today. read more:

CEPHEID (symbol: CPHD) was one of the worst losers of the trading day today
(2016-04-29), losing -19.38%. The number of shares that changed hands was
3,018,446, or about 3 times the average daily volume in the stock.
The closing price was $28.54, amounting to a market cap of $2,070,000,000,
about -55.19% off the highest price in the last 12 months. The stock has
been trading at a range between $26.22 and $63.69.
CPHD is in the Biotechnology: Laboratory Analytical Instruments industry,
part of the Capital Goods sector. It first went public in 2000.