M & 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 initiates DKUSXE (op's), Macquarie upgrades ETR, Bofa upgrades SCHN, Nomura cuts SHW Citi upgrades VNO (buy), Baird initiat