Brexit widens chasm between Wall Street and Europe's investment banks

By Anjuli Davies and Olivia Oran LONDON/NEW YORK (Reuters) - Market ructions caused by Britain's decision to leave the European Union are set to widen the gulf between Wall Street and European investment banks, potentially leaving the continent without its own global champion. The Brexit vote has pushed shares in Deutsche Bank and Credit Suisse to record lows and triggered a string of analyst downgrades, highlighting expectations that Europe's already-struggling investment banks will be pushed f