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

null (symbol: PGNX) was one of the worst losers of the trading day today
(2015-07-29), losing -10.51%. The number of shares that changed hands was
1,798,719, or about 1 times the average daily volume in the stock.
The closing price was $8.43, amounting to a market cap of $587,100,000,
about -24.39% off the highest price in the last 12 months. The stock has
been trading at a range between $8.28 and $11.15.
PGNX is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 1997.
Looking at its valuation, the stock is now trading at 187.33 times earnings.