Benzinga's Top #PreMarket Losers

Yahoo! YHOO dropped 3.63% to $35.60 in pre-market trading. Alibaba reported revenue for the year ending March 31 of $8.47 billion and reported Yahoo stake in Alibaba of 22.5% versus 22.6% as of December 31, 2013. JD.com JD dipped 3.49% to $26.82 in pre-market trading after gaining 2.28% on Friday. Vertex Pharmaceuticals VRTX shares dropped 3.18% to $71.15 in pre-market trading after falling 0.01% on Friday. Zynga ZNGA shares fell 2.58% to $3.02 in pre-market trading. Zynga shares have gained 9.93% over the past 52 weeks, while the S&P 500 index has jumped 19.02% in the same period.