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

IDEXX Laboratories, Inc. (symbol: IDXX) was one of the worst losers of the
trading day today (2015-10-28), losing -10.19%. The number of shares that
changed hands was 3,941,697, or about 6 times the average daily volume in
the stock.
The closing price was $68.92, amounting to a market cap of $6,340,000,000,
about -18.2% off the highest price in the last 12 months. The stock has
been trading at a range between $61.37 and $84.25.
IDXX is in the Biotechnology: In Vitro & In Vivo Diagnostic Substances
industry, part of the Health Care sector. It first went public in 1991.
Looking at its valuation, the stock is now trading at 36.9 times earnings.