ies downgrades PEG Key Research: DB upgrades AZO (buy), JPM downgrades DOW, UBS downgrades EW, GS upgrades JPM & cuts MS Key Research: GS upgrades LPS/PBI & downgrades CTSH/SAPE, RBC initiates SLW (op), Sterne initiates AIG (buy) Key Research: Nomura cuts top 3 Greek banks, Exane lowers f's European Capital Goods Key Resea