feries downgrades XCO/DLR & upgrades AMD CLSA upgrades Toshiba (6502 JP) (buy), JMP upgrades NUVA, Raja downgrades UAM CS initiates SYK/ZMH (op's), Piper initiates SPNC/GTIV (ow), FBR initiates WRLD (mp), Sitfel upgrades AFFY (buy) Key Research: DB upgrades VECO (buy), Baird downgrades RRMS, Susquehanna initiates MYL/WP