B Lab's global impact investing rating system GIIRS, will assess the social and environmental impact (but not the financial performance) of companies and funds using a ratings approach analogous to Morningstar investment rankings or S&P credit risk ratings.

Meanwhile, the Global reporting Initiative (GRI) is amplifying its calls for sustainability reporting. (globalreporting.org)

"By mainstreaming sustainability reporting in the private sector, we can identify the areas of performance that need to be improved in order to protect our planet and our future," says Ernst Ligteringen, chief executive of the Global Reporting Initiative.

Good stories and doing good are one thing. But good numbers will transform impact investing--and perhaps the world.

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