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Key takeaways:

  • In August 2024, Morningstar shifted its Style BoxTM methodology, resulting in many former “growth” stocks being reclassified as “blend” and “blend” stocks now designated as “value.”
  • As a result, “core” holdings now skew toward higher beta,1 higher valuations and lower dividend yields, which could lead some investors with core equity exposure to underestimate portfolio risk.
  • To recalibrate risk exposure to the previous core profile, investors may want to allocate more to strategies that focus on high-quality, resilient business models and a modestly lower beta profile.

Taking a closer look at core

As the largest market in the world, US equities often hold a prominent place in global indexes and investor portfolios. In fact, as of March 31, 2025, US equities made up over 50% of total net assets in the United States. Among US equity holdings, US large blend funds and exchange-traded funds (ETFs) accounted for more than half of all assets, totaling over US$8 trillion. This stands to reason, as investors aiming to tap into the US market often prefer broad exposure to core/blend, liquid, large-cap companies.

But here’s the twist: What if those “blend” assets aren’t as “core” as we thought? How might this shift an investor’s perception of portfolio risk? We believe Morningstar’s changes to its style calculations last summer merit further evaluation. Recent market volatility might make this a good time to reassess portfolio risk.

The Style BoxTM

Back in 1992, Morningstar introduced its iconic nine-grid Style Box, designed around two key axes: size and style (Exhibit 1). Morningstar assigns each company to a style box based on a proprietary algorithm. The placement of a fund or index within a style box is based on aggregating the weighted-average style scores of the underlying holdings.

Fast forward to today, and these boxes have become the go-to tool for categorizing funds into easily digestible categories. By pinpointing where a security lands within the Style Box, investors can make informed assumptions about risk and return factors, paving the way for a well-diversified portfolio.

Exhibit 1: Morningstar Style Box

What Does It Look Like?

Source: Morningstar. The Morningstar Style Box is a nine-square grid with three stock investment styles for each of three size categories: ‘small’, ‘mid’ and ‘large’. Two of the three style categories are ‘value’ and ‘growth’, while the third is ‘blend’ (funds that own a mixture of growth and value stocks). The darkened square details where a portfolio’s center of gravity is, in terms of its style and market cap characteristics.

Morningstar’s 2024 methodology change shifted many US large-cap stocks from growth to blend or value, potentially altering investors’ perceptions of their portfolio exposures. In today’s volatile market, we believe dividend growth strategies can offer a resilient core equity approach with potential downside protection and steady long-term performance.



IMPORTANT LEGAL INFORMATION

This material is intended to be of general interest only and should not be construed as individual investment advice or a recommendation or solicitation to buy, sell or hold any security or to adopt any investment strategy. All investments involve risks, including possible loss of principal. There is no guarantee that a strategy will meet its objective. Performance may also be affected by currency fluctuations. Reduced liquidity may have a negative impact on the price of the assets. Currency fluctuations may affect the value of overseas investments. Where a strategy invests in emerging markets, the risks can be greater than in developed markets. Where a strategy invests in derivative instruments, this entails specific risks that may increase the risk profile of the strategy. Where a strategy invests in a specific sector or geographical area, the returns may be more volatile than a more diversified strategy.

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