Benzinga's Top Pre-Market NASDAQ Losers

F5 Networks Inc FFIV dipped 3.16% to $101.50 in the pre-market session. Analysts at JP Morgan downgraded F5 Networks from “overweight” to “neutral.” GTx Inc GTXI dropped 2.49% to $5.10 in the pre-market trading. GTXI reported that it intends to offer and sell shares of its common stock in an underwritten public offering. Qiagen NV QGEN moved down 2.04% to $18.72 in the pre-market session. QGEN's PEG ratio is 1.55. Sina Corporation SINA fell 1.91% to $84.41 in the pre-market session. SINA's trailing-twelve-month profit margin is -6.81%.