A proposed clean-energy rule could shake up corporate America—and your portfolio

A proposed revision by GHG Protocol would require companies to claim credit for clean energy produced during the same hour and on the same grid as fossil fuel generation. This rigorous accounting change could invalidate over 90 percent of today's certification market, triggering a major reset for most corporations. Pushback has been overwhelmingly negative, with opponents warning that mandatory time and location matching could limit business prospects.