Commerzbank AG (OTCMKTS:CRZBY – Get Free Report) was the recipient of a large increase in short interest in September. JPMorgan Chase & Co. lowered Commerzbank from an “overweight” rating to a “neutral” rating in a research note on Tuesday, September 9th. Deutsche Bank Aktiengesellschaft lowered Commerzbank from a “buy” rating to a “hold” rating in a research note on Monday, August 18th. The Goldman Sachs Group lowered Commerzbank from a “hold” rating to a “sell” rating in a research note on Tuesday, August 26th. Royal Bank Of Canada restated a “sector perform” rating on shares of Commerzbank in a research note on Monday, August 11th.