LONDON, March 28 (Reuters) - Aviva
* Aviva sells us equity manager river road
* Aviva Investors, the asset management business of Aviva plc announces a definitive agreement to sell US equity manager River Road Asset Management to Affiliated Managers Group, Inc.
* The sale represents a modest premium to group NAV and will increase both the IGD solvency surplus and economic capital surplus by £0.1bn. Source text for Eikon: Further company coverage: (Reporting by Paul Sandle)