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

ZIOPHARM Oncology Inc (symbol: ZIOP) was one of the worst losers of the
trading day today (2016-07-19), losing -8.02%. The number of shares that
changed hands was 6,093,215, or about 2 times the average daily volume in
the stock.
The closing price was $4.59, amounting to a market cap of $597,690,000,
about -69.26% off the highest price in the last 12 months. The stock has
been trading at a range between $4.46 and $14.93.
ZIOP is in the Medical Specialities industry, part of the Health Care
sector.