Citigroup is looking to get back to serving small investors after being forced to exit the brokerage business more than a decade ago, sources tell On The Money. People with knowledge of the big bank's thinking say adding a sizable brokerage to deal with retail clients and high-end investors is part of CEO Jane Fraser's turnaround strategy, which began with a major reorganization of the long-suffering big bank, cost-cutting and the hiring of new leadership. In the past year, Wall Street has applauded Fraser' ...