Big tech gainers: DDD, SSYS, XONE, ENPH, SEDG, CAMP, CTRL, TRUE

• The Nasdaq is up 1.5% as equity markets display a renewed appetite for risk, and a large number of tech companies are posting 5%+ gains.
• Major gainers include 3D printer makers 3D Systems (DDD +6.8%), Stratasys (SSYS +7.3%), and ExOne (XONE +10.4%), solar microinverter maker Enphase (ENPH +10.7%) and rival SolarEdge (SEDG +6.1%), car-buying site TrueCar (TRUE +10%), defense IT firm Kratos (KTOS +9.5%), online ad software firm Marin Software (MRIN +8.3%), and CDN owner Limelight (LLNW +8.9%).
• Others: IP licensing firm Acacia (ACTG +7.2%), application delivery controller/security hardware vendor A10 Networks (ATEN +8.3%), travel deal site Travelzoo (TZOO +7.5%), home automation tech provider Control4 (CTRL +8.5%), M2M/telematics hardware and services firm CalAmp (CAMP +6.1%), online video hosting platform Brightcove (BCOV +6%).
• 3D printing stocks, hit hard in 2014 and 2015, are reversing the big losses seen last Tuesday. Travelzoo's gains follow last Thursday's CEO change announcement. CalAmp is now up 24% since beating FQ2 estimates and providing in-line FQ3 guidance on Oct. 1.
• Previously covered: Twitter, Cisco, Rackspace, Micron, SunEdison, Vivint, Juniper, CEVA, Knowles, Yandex/Qiwi