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

Omeros Corporation (symbol: OMER) was one of the worst losers of the
trading day today (2015-12-09), losing -8.5%. The number of shares that
changed hands was 635,754, or about 1 times the average daily volume in the
stock.
The closing price was $14.32, amounting to a market cap of $543,720,000,
about -52.63% off the highest price in the last 12 months. The stock has
been trading at a range between $10.48 and $30.23.
OMER is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2009.