Europe stocks slump after bank downgrades By: MarketWatch June 22, 2012 at 03:54 AM EDT European stocks slump as a fresh round of bank downgrades sends the sector lower and resource firms drop as oil prices continue to fall sharply. Read More >> Related Stocks: BP Plc ADR Barclays Plc ADR Bhp Billiton Ltd ADR Credit Suisse Group ADR Royal Bank Scotland Group Plc Totalenergies Se ADR