$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 (2015-09-25), losing -13.84%. The number of shares that
changed hands was 5,700,326, or about 2 times the average daily volume in
the stock.
The closing price was $10.96, amounting to a market cap of $1,420,000,000,
about -23.89% off the highest price in the last 12 months. The stock has
been trading at a range between $2.31 and $14.4.
ZIOP is in the Medical Specialities industry, part of the Health Care
sector.