Citigroup, Morgan Stanley - The banks disagree on the value of their jointly owned Morgan Stanley Smith Barney brokerage unit. The two exchanged appraisals as Morgan Stanley moves ahead with plans to add another 14 percent to its current 51 percent stake. A third party will conduct an appraisal, which could result in significant non-cash third quarter charges for Citi, which values the unit 60 percent higher than Morgan Stanley does.