rch: Key Research: Key Research: Key Research: BMO initiates CHKP (mp), Piper initiates WDAY (neut) upgrades AKAM & cuts CTLNVIN Cowen initiates LNKD/P (neut) & assumes AMZN/GOOG (op) and EBAY/IACUNFLXNHOO (neut's) DB upgrades HERO/NBR/PES/PTEN (buy's) & cuts ESV/RDC/SDRL & makes BHI top pick Raja