, IDIX, UNXL, VNTV (holders) IPO's (lock-up expires): AVG Tech (AVG), Greenway Medical (GWAY), Matador Resources (MTDR) Key Research: DB downgrades NU & resumes CVI (hold), SunTrust initiates CBST (neut) Key Research: Raja downgrades BMC, CS downgrades BMC, Roth upgrades RTIX (buy) Key Research: W B