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

Heartware International, Inc. (symbol: HTWR) was one of the worst losers of
the trading day today (2015-09-02), losing -20.77%. The number of shares
that changed hands was 4,356,964, or about 16 times the average daily
volume in the stock.
The closing price was $64.82, amounting to a market cap of $1,120,000,000,
about -32.19% off the highest price in the last 12 months. The stock has
been trading at a range between $61.52 and $95.59.
HTWR is in the Medical/Dental Instruments industry, part of the Health Care
sector.