The Rivernorth Managed Duration Municipal Income Fund Inc. (RMM) is a closed-end investment vehicle dedicated to fixed-income assets. It was launched and is managed by RiverNorth Capital Management, LLC, with MacKay Shields LLC serving as co-manager. The fund's strategy involves investing in the U.S. fixed-income markets, with a primary focus on investment-grade municipal debt across all maturities. To guide its investment decisions, the fund utilizes a combination of fundamental and quantitative analysis, underpinned by proprietary research for portfolio construction. Its performance is measured against the Bloomberg Barclays Municipal Bond Index. This fund, domiciled in the United States, commenced operations on July 26, 2019.