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

Exact Sciences Corporation (symbol: EXAS) was one of the worst losers of
the trading day today (2016-08-16), losing -5.86%. The number of shares
that changed hands was 5,227,752, or about 1 times the average daily volume
in the stock.
The closing price was $20.23, amounting to a market cap of $1,990,000,000,
about -14.75% off the highest price in the last 12 months. The stock has
been trading at a range between $4.67 and $23.73.
EXAS is in the Biotechnology: Commercial Physical & Biological Resarch
industry, part of the Health Care sector. It first went public in 2001.