Financials gain; Goldman says buy Nasdaq OMX By: MarketWatch May 27, 2011 at 11:34 AM EDT Goldman’s upgrade for the parent of Nasdaq lifted the stock-exchange operator’s shares almost 5%, helping the broader financial sector. Read More >> Related Stocks: American Express Bank of America FINANCIAL SEL JPMorgan Chase & Co Nasdaq OMX Group Standard & Poors 500 TravelersCompanies