Benzinga's Top #PreMarket Losers

Acceleron Pharma XLRN shares fell 8.92% to $52.00 in the pre-market trading after the company priced 2.4 million shares of common stock at $50.00 per share. Ballard Power Systems BLDP dipped 4.11% to $2.10 in the pre-market session. Ballard shares have jumped 222.06% over the past 52 weeks, while the S&P 500 index has gained 23.42% in the same period. YY YY shares dropped 3.47% to $66.50 in pre-market trading. YY's trailing-twelve-month ROA is 12.12%. Ctrip.com International CTRP dipped 3.02% to $41.76. Ctrip.com's PEG ratio is 1.68.