Notable tech gainers/decliners: QIHU, BITA, VIPS, OTIV, LXK, ENPH

• With the Nasdaq up 0.9% (and nearing its March 2000 highs) amid a market rally, major tech gainers are easily outnumbering major decliners.
• Following a 1.4% overnight rally in Shanghai, strong Q1 guidance from Ctrip, and a report that Sohu/Tencent's Sogou search engine is planning an IPO, a slew of Chinese tech names are posting big gains. Aside from Ctrip and Sohu, notable gainers include search/browser/security app provider Qihoo (QIHU +4.9%), sports lottery site 500.com (WBAI +12.5%), auto sites Bitauto (BITA +4.2%) and Autohome (ATHM +4.9%), online retailer Vipshop (VIPS +4.7%), data center owner 21Vianet (VNET +6.7%), polysilicon maker Daqo (DQ +6.5%), and chat/dating app owner Momo (MOMO +4.6%).
• Other standouts include optical component vendor Oclaro (OCLR +9.6%), U.S. solar installer Solar3D (SLTD +10%), NFC reader maker On Track (OTIV +10.5%), printer maker Lexmark (LXK +3.7%), and big data/analytics software provider Hortonworks (HDP +10.2%).
• Notable decliners include VoIP hardware/software provider Sonus (SONS -6.1%),  solar microinverter leader Enphase (ENPH -4.2%), and authentication hardware/software provider Vasco (VDSI-OLD -5.7%).
• Qihoo is adding to Wednesday's gains, while 500.com and 21Vianet are erasing recent losses. On Track is now up 21% over the last two days. Solar3D is adding to the gains seen yesterday following a contract announcement. Vasco had rallied strongly this week before today.
• Previously covered: Ambarella, Spherix, Envivio, Youku, Viggle, Castlight/Benefitfocus, Care.com, Ultra Clean, InterCloud, Perceptron, Violin Memory, Amtech