We look here at an interesting idea from three senior Fannie Mae officials: an index to measure a Single-Family MBS’s social impact.  The proposal seeks to enable socially conscious investors to support affordable housing for underserved communities while balancing the needs of mortgage borrowers, investors, and market function.  It also reflects the objectives laid out in Fannie Mae’s Equitable Housing Finance Plan such as providing social impact data and boosting low-income and minority homeownership. …

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