Greystone Housing Impact Investors LP acquires, holds, sells, and deals in a portfolio of mortgage revenue bonds (MRBs) that are issued to provide construction and/or permanent financing for multifamily and student housing residential properties and commercial properties. It operates through four segments: Affordable Multifamily MRB Investments, Seniors and Skilled Nursing MRB Investments, MF Properties, Market-Rate Joint Venture Investments. The company was formerly known as America First Multifamily Investors, L.