Benzinga's Top #PreMarket Losers

Qualys Inc QLYS fell 23.93 percent to $41.90 in pre-market trading after the company issued a downbeat outlook for the second quarter. AcelRx Pharmaceuticals Inc ACRX shares fell 23.81 percent to $3.20 in pre-market trading after the company reported Q1 GAAP loss of $0.27 per share and issued a Zalviso regulatory update. Endurance International Group Hldgs Inc EIGI shares dropped 7.55 percent to $18.50 in pre-market. Endurance Group reported Q1 earnings of $0.01 per share on revenue of $177.3 million. Cyberark Software Ltd CYBR shares declined 2.78 percent to $64.95 in pre-market trading after falling 0.16 percent on Monday. Genworth Financial Inc GNW slipped 2.73 percent to $8.90 in pre-market trading. Morgan Stanley downgraded Genworth Financial from Equal-weight to Underweight.