Why do Morningstar ratings differ across platforms, and how should I interpret them?
Morningstar ratings are a valuable tool for evaluating stocks and funds, but differences in methodologies and platform-specific data can lead to variations in the ratings you see. This article explains the key factors behind these differences and provides guidance on how to interpret and use Morningstar ratings effectively.
Overview of Morningstar Ratings
Morningstar provides two main types of ratings for stocks and funds:
Qualitative Analyst Ratings: These are based on in-depth research conducted by human analysts. They include fair value estimates and detailed company or fund analysis. These ratings do not have a "Q" label.
Quantitative Ratings: These are algorithm-generated ratings that rely on statistical models. They are displayed with a "Q" label and are typically used when analyst coverage is unavailable.
Differences Between Qualitative and Quantitative Ratings
Stocks with analyst coverage receive a qualitative rating, while those without coverage are assigned a quantitative (Q) rating. A stock will have only one type of rating at a time, depending on its coverage.
Quantitative ratings are model-driven and may differ from qualitative ratings due to the absence of human analysis.
Platform-Specific Rating Discrepancies
Morningstar ratings can vary across platforms due to differences in the type of ratings displayed and the underlying data used:
Broker Platforms (e.g., CMC Markets, CommSec): These platforms often display Morningstar’s global quantitative ratings and fair value estimates. These ratings are algorithm-driven and typically rely on a limited dataset (e.g., six months of research).
Morningstar Investor Platform: This platform provides qualitative, analyst-driven research with deeper insights, a longer history (up to 10 years), and exclusive content.
Because the methodologies and data scopes differ, ratings and fair value estimates on broker platforms may not match those on Morningstar’s own platform.
Historical Rating Changes and How to Access Them
Morningstar ratings can change over time as new information becomes available. For example, a fund like JEPI may have had a Gold rating in the past but now shows a Neutral rating with 2 stars. The most recent rating is the correct one to rely on. To view historical ratings on Morningstar Investor:
Open the stock or fund’s summary page.
Navigate to the Analysis section.
Select Archive to access past ratings and reports.
Best Practices for Using Morningstar Ratings
Use the Morningstar Investor platform for the most comprehensive and detailed qualitative research.
Treat quantitative (Q) ratings as a model-based alternative when qualitative ratings are unavailable.
Always rely on the most recent rating for decision-making.
Consider platform-specific differences when comparing ratings across sources.
By understanding the methodologies and data behind Morningstar ratings, you can make more informed investment decisions and better interpret the information provided on different platforms.