"Ethisphere′s notion that the financial value and ethics are inexorably tied together has been explained through an analysis of how the stock price of publicly-traded 2017 honorees compare to the S&P 500 over the last two years. The analysis demonstrates a 6.4% premium Ethisphere refers to as an ‘ethics premium.′"

[COMMENTARY] I like Ethisphere’s work. Their list is always worth a review.
Ethisphere Announces 124 Companies to Make the 2017 World′s Most Ethical Companies List, press release, March 13, 2017, Ethisphere, USA.