Notable tech gainers: YOKU, VHC, CALL, COUP, NSR, VECO, AIXG

• The the Nasdaq is up only fractionally ahead of the long weekend, the ranks of major tech gainers have easily outnumbered the ranks of major decliners today.
• Today's notable gainers include Chinese online video site Youku (YOKU +4.5%), IP licensing firm VirnetX (VHC +6.7%), mobile payment-processing/telemetry services firm USA Technologies (USAT +5.8%), VoIP service provider magicJack (CALL +5%), LED/chip equipment firm Aixtron (AIXG +4.9%), Chinese jobs site 51job (JOBS +4.9%), grocery coupon site Coupons.com (COUP +4.5%), telecom services/analytics firm Neustar (NSR +3.2%), and LED/chip equipment vendors Veeco (VECO +2.7%) and Aixtron (AIXG +4.9%).
• Youku is bouncing after having sold off to new 52-week lows in the wake of its Q4 numbers and an SEC inquiry disclosure. magicJack is recovering some of the big March losses seen after the company posted mixed Q4 results. Neustar is now up 19% since confirming a major contract loss and announcing a $150M buyback a week ago.
• Previously covered: 500.com, AudioCodes, Renren, Expedia, Hutchison, ReneSola, Cheetah Mobile, Sungy Mobile, Yandex, Digital Ally
• Notable decliners: Motorola Solutions, NeoPhotonics, TrueCar, Carbonite, Elephant Talk