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

Aduro Biotech, Inc. (symbol: ADRO) was one of the worst losers of the
trading day today (2015-12-22), losing -9.01%. The number of shares that
changed hands was 323,967, or about 1 times the average daily volume in the
stock.
The closing price was $26.98, amounting to a market cap of $1,710,000,000,
about -45.22% off the highest price in the last 12 months. The stock has
been trading at a range between $16.28 and $49.25.
ADRO is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2015.