As ZIOPHARM Oncology, Inc. (NASDAQ:ZIOP) drops to US$212m market cap, insiders might rethink their US$639k stock purchase earlier this year

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[unable to retrieve full-text content]The recent price decline of 16% in ZIOPHARM Oncology, Inc.’s (NASDAQ:ZIOP) stock may have disappointed insiders who bought US$639k worth of shares at an average price of US$1.78 in the past 12 months.