A Portfolio Approach to Impact Investment: A Practical Guide to Building, Analyzing and Managing a Portfolio of Impact Investments
A report describing how to analyze impact, return and risk for a portfolio of impact investments. On page 3, the report identifies IRIS metrics as central to articulating a set of well-defined impact goals for the portfolio.
"Founded in 2008, IRIS has since been adopted by hundreds of impact investment funds and thousands of companies globally as part of their social performance measurement and reporting."
Support for IRIS, page 11