We are missing a standardized framework, evaluation and rating methodology for the assessment of sustainable investments.

FORBES: Banks Need to Play a Larger Role in Social Good

Usually, colleges get a new bond rating when they issue new debt through public markets, and the evaluation affects already-issued debt.

FORBES: More Colleges See Bonds Downgraded

The guidelines make the evaluation process almost a purely subjective exercise that allows the rating agency to make pretty much any call they wish.

FORBES: S&P's Inconvenient Truth About Municipal Bonds