$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 (2016-07-15), losing -11.64%. The number of shares that
changed hands was 12,686,754, or about 5 times the average daily volume in
the stock.
The closing price was $5.01, amounting to a market cap of $652,380,000,
about -66.44% off the highest price in the last 12 months. The stock has
been trading at a range between $4.56 and $14.93.
ZIOP is in the Medical Specialities industry, part of the Health Care
sector.