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

Dynavax Technologies Corporatio (symbol: DVAX) was one of the worst losers
of the trading day today (2016-04-27), losing -11.68%. The number of shares
that changed hands was 3,580,803, or about 4 times the average daily volume
in the stock.
The closing price was $18.53, amounting to a market cap of $712,020,000,
about -42.97% off the highest price in the last 12 months. The stock has
been trading at a range between $15.52 and $32.49.
DVAX is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2004.