RMM - RMM: Muni Exposure And Monthly Income June, 15 2021 05:45 AM RiverNorth Managed Duration Municipal Income Fund Inc RMM is another RiverNorth fund that is similar to RMI that we just covered. The strategies are largely the same; however, RMM is meaningfully larger, and the portfolio hedged duration is shorter. Over the last year, RMM has outperformed RMI as well. For further details see: RMM: Muni Exposure And Monthly Income