$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 (2016-06-21), losing -7.84%. The number of shares
that changed hands was 6,372,112, or about 2 times the average daily volume
in the stock.
The closing price was $9.99, amounting to a market cap of $976,930,000,
about -69.59% off the highest price in the last 12 months. The stock has
been trading at a range between $4.67 and $32.85.
EXAS is in the Biotechnology: Commercial Physical & Biological Resarch
industry, part of the Health Care sector. It first went public in 2001.