Benzinga's Top Pre-Market NASDAQ Gainers (TRAD, BIIB, FFIV, OREX)

TradeStation Group Inc TRAD shares surged 31.31% to $9.73 in the pre-market session. Monex Group announced its plans to acquire TRAD for around $411 million. Biogen Idec Inc BIIB shares advanced 15.47% to $99.96 in the pre-market session. BIIB reported upbeat Q1 results. F5 Networks Inc FFIV climbed 10.57% to $110.28 in the pre-market session. FFIV reported a 68 percent rise in its Q2 profit. Orexigen Therapeutics Inc OREX jumped 8.22% to $3.16 in the pre-market session. OREX shares have dropped 53.94% over the past 52 weeks, while the S&P 500 index has gained 10.32% in the same period. Read more from Benzinga's Markets.