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

Exelixis, Inc. (symbol: EXEL) was one of the worst losers of the trading
day today (2016-09-29), losing -8.01%. The number of shares that changed
hands was 17,034,720, or about 3 times the average daily volume in the
stock.
The closing price was $12.28, amounting to a market cap of $2,830,000,000,
about -21.18% off the highest price in the last 12 months. The stock has
been trading at a range between $3.55 and $15.58.
EXEL is in the Biotechnology: Commercial Physical & Biological Resarch
industry, part of the Health Care sector. It first went public in 2000.