Morningstar Sustainability Rating

The Morningstar Sustainability Rating, commonly displayed as one to five globes, is a portfolio-level assessment of environmental, social, and governance risk relative to funds in the same Morningstar Global Category. Under Morningstar’s methodology, a higher globe rating indicates lower ESG risk relative to that peer group.

The rating does not measure a fund’s historical return, predict future performance, prove positive environmental or social impact, or show that the fund follows an intentional sustainable-investing mandate. It summarizes selected ESG-risk characteristics of portfolio holdings under a proprietary methodology.

Key Takeaways

• The globe rating applies to a fund or portfolio, not directly to one company.
• It uses underlying corporate and sovereign ESG-risk assessments as applicable to the holdings.
• Funds are compared within Morningstar Global Categories, so globe ratings across unlike categories are not absolute rankings.
• Historical portfolio holdings matter; the displayed rating may not describe only today’s positions.
• A fund can receive globes even if sustainability is not part of its stated investment strategy.
• The rating does not replace analysis of holdings, fees, performance, duration, credit, liquidity, or portfolio fit.

What the Rating Measures

Morningstar’s methodology is designed to indicate the ESG risk embedded in a managed product or index relative to similar portfolios. The underlying inputs include Sustainalytics assessments of unmanaged financially material ESG risk for corporate issuers and country-risk assessments for sovereign issuers.

The methodology distinguishes exposure from management. A company can face substantial inherent ESG exposure because of its industry and still manage part of that exposure effectively. Some risk may be considered unmanageable within the existing business model. The portfolio rating aggregates applicable issuer-level information rather than evaluating the fund manager’s intentions.

How the Globe Rating Is Built

At a high level, the process includes:

1. Determine eligibility and coverage. The portfolio needs sufficient current holdings and underlying ESG-risk data under the methodology.
2. Calculate portfolio scores. Applicable corporate and sovereign holdings contribute to separate portfolio risk measures.
3. Use historical portfolios. The method incorporates portfolio observations over a trailing period rather than relying on one isolated holdings date.
4. Compare with peers. Eligible portfolios are ranked within the relevant Morningstar Global Category.
5. Assign the rating. The relative result is displayed on a one-to-five globe scale, with more globes indicating lower ESG risk relative to category peers.

The exact eligibility, coverage, weighting, history, peer-ranking, and calculation rules are provider methodology details. They can change, so an analyst should retain the methodology version and rating date used for a decision.

How to Read One to Five Globes

The rating is relative. A five-globe fund in one category can have a higher underlying ESG-risk score than a three-globe fund in another category if the peer distributions differ.

Worked Example

Assume two hypothetical funds have these characteristics:

It would be incorrect to conclude that the infrastructure fund has lower absolute ESG risk than the government bond fund merely because it has more globes. Each is evaluated in a different category and may rely on different mixes of corporate and sovereign inputs.

Now suppose the infrastructure fund sells several lower-risk utilities and buys firms with higher unmanaged operational and governance risk. Its portfolio ESG-risk score may deteriorate. The globe rating might remain unchanged if peer funds deteriorate by a similar amount, or it might decline after the holdings history and peer comparison update.

This illustrates two points: a relative rating depends on both the portfolio and its peers, and a current holdings change may not flow instantly into a historical portfolio measure.

What the Rating Does Not Tell You

The globe rating does not by itself establish:

• whether the fund intentionally follows ESG, impact, exclusion, or stewardship practices;
• whether holdings align with a reader’s values;
• whether a fund finances new environmental or social activity;
• whether reported outcomes were caused by the fund or its investors;
• whether the fund is diversified, liquid, low cost, or tax efficient;
• whether a bond fund has acceptable duration, credit, currency, or prepayment risk; or
• whether the fund is attractively priced or likely to outperform.

A conventional fund can receive a strong globe rating because of its holdings. An intentionally sustainable fund can receive fewer globes if it invests in companies with elevated current ESG risk, including firms attempting difficult transitions.

Morningstar Globes vs. Other Assessments

These tools answer different questions. Their symbols and outputs should not be combined as though they share one scale.

How to Evaluate a Fund Alongside Its Globe Rating

Read the prospectus, shareholder report, holdings, benchmark, and costs. The globe rating is one research input, not a substitute for those documents.

Risks and Limitations

• Peer-relative interpretation: a category comparison can hide large absolute differences across categories.
• Holdings lag: portfolio data and historical averaging may not capture the latest trades immediately.
• Coverage limits: unscored assets and eligibility rules can affect whether a rating is available and what it represents.
• Underlying-model risk: the output depends on Sustainalytics corporate and sovereign methodologies, estimates, and data.
• Aggregation risk: a portfolio result can hide severe exposure in individual holdings.
• Category risk: classification changes or unusual peer groups can affect the relative result.
• Methodology-change risk: rating changes can arise from calculation changes rather than portfolio-manager action.
• Intent mismatch: the rating describes portfolio ESG risk, not a manager’s stated sustainability commitment.
• Investment risk: a high globe rating does not protect against market loss, default, rate changes, or poor manager performance.

Common Mistakes

• Calling the globes an impact score or ethical grade.
• Comparing globe counts across unrelated Morningstar Global Categories as absolute measures.
• Assuming a five-globe fund must have an ESG mandate.
• Treating one globe as a prediction of poor financial performance.
• Ignoring sovereign holdings, unscored assets, derivatives, cash, and coverage rules.
• Using the current portfolio with a rating based partly on earlier holdings without checking dates.
• Confusing the Sustainability Rating with Morningstar’s star or analyst-driven fund assessments.
• Selecting a fund from its globes without reviewing holdings, fees, benchmark, and ordinary risk.

Primary Source

Morningstar’s ESG Risk Ratings for Funds methodology describes the rating’s scope, corporate and sovereign inputs, eligibility, historical portfolio calculations, category comparison, and globe assignment. Morningstar’s Portfolio ESG Risk Rating definition provides a shorter explanation of the peer-relative result.

These are provider materials describing a proprietary methodology. They should be read with the current fund documents and are not independent evidence that a fund is suitable or likely to perform well.

Related Terms

• ESG Ratings: Methodology-dependent assessments of selected ESG risks, characteristics, or performance.
• MSCI ESG Ratings: An industry-relative company assessment rather than a portfolio globe rating.
• ESG Criteria: The factors and rules used to construct assessments.
• ESG Investing: Investment processes that can use ratings as one input.
• Institutional Investor: An organization investing assets under a mandate or for beneficiaries.

FAQs

This article is for financial education only and is not personalized investment advice. Morningstar and Sustainalytics methodologies, names, coverage, and calculations can change; consult the current provider methodology and fund documents before relying on a rating.