There are 4 key components that drive the Morningstar rating: our assessment of the firm's economic moat, our estimate of the stock's fair value, our uncertainty around that fair value estimate and the current market price. Let’s dive a little deeper into each of these components:
Economic Moat
The Morningstar Economic Moat rating plays a vital role in our qualitative assessment of a firm’s long-term investment potential and the calculation of our fair value estimate. An economic moat is a structural feature that allows a firm to sustain excess profits over a long period of time. We define economic profits as returns on invested capital (ROIC) over and above our estimate of a firm’s cost of capital or weighted average cost of capital (WACC). Without a moat, profits are more susceptible to competition. We have identified 5 sources of economic moats: intangible assets, switching costs, network effect, cost advantage and efficient scale.
Analysts assign one of 3 Economic Moat ratings: none, narrow or wide. Companies with a narrow moat are those we believe are more likely than not to achieve normalized excess returns for at least the next 10 years. Wide-moat companies are those in which we have very high confidence that excess returns will remain for 10 years, with excess returns more likely than not to remain for at least 20 years. The longer a firm generates economic profits, the higher its intrinsic value. We believe low-quality, no-moat companies will see their normalized returns gravitate toward the firm’s cost of capital more quickly than companies with moats.
When considering a company’s moat, we also assess whether there is a substantial threat of value destruction, stemming from Environmental, Social and Governance (ESG) risks, industry disruption, financial health or other idiosyncratic issues. A risk is considered potentially value destructive if its occurrence would eliminate a firm’s economic profit on a cumulative or mid-cycle basis. If we deem the probability of occurrence sufficiently high, we would not characterize the company as possessing an economic moat.
Fair Value Estimate
This is a Morningstar analyst’s estimate of the intrinsic value of what a stock is worth, calculated by determining how much we would pay today for all the streams of excess cash generated by the company in the future. We arrive at this value by forecasting a company’s future financial performance using a detailed discounted cash-flow model. By combining our analyst inputs with the moat rating, our models fade a firm’s ROIC and earnings growth rate from the end of an analyst’s explicit forecast horizon until the perpetuity period.
Uncertainty Rating
The Uncertainty Rating captures a range of likely potential intrinsic values for a company and uses it to assign the margin of safety required before investing, which in turn explicitly drives our stock star rating system. The Uncertainty Rating represents the analyst’s ability to bound the estimated value of the shares in a company around the Fair Value Estimate. It’s based on the characteristics of the business underlying the stock, including operating and financial leverage, sales sensitivity to the overall economy, product concentration, pricing power, exposure to material ESG risks and other company-specific factors.
The rating is expressed as low, medium, high, very high or extreme. Each uncertainty rating has a corresponding set of price/fair value ratios that are used to assign star ratings as shown in the graph in the back of the report under the Research Methodology for Valuing Companies section.
Market Price
This covers the current market prices of a stock.
Once Morningstar analysts determine the fair value estimate of a stock, we compare it daily with the stock’s current market price while adjusting for the uncertainty rating. The star rating is re-calculated at the market close on every day the market is open. Morningstar uses a 5-star rating system. Since our star ratings are guideposts to a broad audience, individuals must consider their own specific investment goals, risk tolerance, tax situation, time horizon, income needs and complete investment portfolio, among other factors.