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

Nektar Therapeutics (symbol: NKTR) was one of the worst losers of the
trading day today (2015-10-06), losing -9.73%. The number of shares that
changed hands was 3,440,155, or about 2 times the average daily volume in
the stock.
The closing price was $10.3, amounting to a market cap of $1,360,000,000,
about -41.24% off the highest price in the last 12 months. The stock has
been trading at a range between $9.16 and $17.53.
NKTR is in the Major Pharmaceuticals industry, part of the Health Care
sector.
Looking at its valuation, the stock is now trading at 219.15 times earnings.