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

Henry Schein, Inc. (symbol: HSIC) was one of the worst losers of the
trading day today (2016-11-21), losing -5.36%. The number of shares that
changed hands was 2,876,503, or about 4 times the average daily volume in
the stock.
The closing price was $148.55, amounting to a market cap of
$11,960,000,000, about -18.83% off the highest price in the last 12 months.
The stock has been trading at a range between $142.64 and $183.0.
HSIC is in the Medical Specialities industry, part of the Health Care
sector. It first went public in 1995.
Looking at its valuation, the stock is now trading at 24.67 times earnings.