For big banks, September to remember in trading By: CNBC.com News September 19, 2014 at 11:48 AM EDT What is historically the worst month for stocks may turn out to be the third quarter's best month for traders-good news for the nation's big banks. Read More >> Related Stocks: Alibaba Group Holding Ltd Barclays Plc ADR Citigroup Goldman Sachs Group JPMorgan Chase & Co