"The rating now provides greater insight into how well companies in a portfolio are managing the material ESG issues they face both relative to their industries and across industries," said Jon Hale, in a recent blog post. In the new rating system where a lower score, rather than a higher one, indicates less ESG risk, Microsoft scores a 13.8, Royal Dutch Shell a 34, which is less than Exxon's 44.5. Morningstar ultimately assigns portfolios a sustainability rating, which ranges from one to five globes, based on their sustainability scores over the past 12 months relative to their global category peers. Only portfolios that have sustainability ratings for at least 67% of their assets are rated. The new Morningstar sustainability ratings also handle portfolios classified as high or severe risk differently than before.