Resilience amid concentration Market extremes call for active judgment

Manage AI risk while pursuing its upside

Passive risk grows

Benchmarks are increasingly dominated by a narrow group of AI-linked companies that may be creating unintended risks.

Valuations are extended

Today's leaders are high-quality companies, but elevated valuations may already reflect optimistic outcomes.

Active judgment can help

As market leadership narrows, active management seeks to participate in growth while building resilience.

Passive market risks are stacked

MSCI All Country World Index (ACWI)
Current value and historic range, 20 years through 6/30/26

Graphic compares concentration risks in the MSCI All Country World Index (ACWI). On the left, an inverted funnel titled “Passive market risks are stacked — MSCI All Country World Index (ACWI)” shows five layers representing different dimensions of market concentration: U.S. equities as a percentage of the index, valuations based on forward price-to-earnings ratio, top 5 as a percentage of the index, semiconductors as a percentage of the index and AI at the narrow tip. On the right, horizontal range bars compare current levels to historical  ranges: U.S. equities are currently 64% versus a 41% to 67% range, forward P/E is 18x versus 9x to 20x, top five holdings represent 16% versus 4% to 18%, and semiconductors represent 17% versus 2% to 17%. A callout box attached to the tip of the inverted pyramid at the bottom reads: “Vulnerability to single theme,” emphasizes how market concentration has increased across multiple dimensions.

Sources: Capital Group, FactSet, Morningstar. Percent of index is based on market capitalization.

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AI disruption is new. Extreme market concentration is not.

See how active investing has navigated narrow markets in the past.

AI cash crunch starting to appear

Soaring AI hyperscalers’ capex is weighing on free cash flow, threatening the high valuations and concentration in AI-related names via passive approaches.

Line chart compares annual capital expenditure (capex) and  free cash flow for major AI hyperscalers from 2012 to  2027, with estimated figures for 2026 and 2027. Both metrics rise steadily through 2024 but diverge sharply thereafter. CAPEX accelerates from roughly $150 billion in 2024 to about $900 billion by 2027 estimates, while free cash flow peaks around $230 billion in 2024 before declining to near $25 billion by 2027 estimates. The chart suggests that rapidly increasing AI infrastructure spending is putting pressure on free cash flow.


Source: FactSet. As of June 30, 2026. Capex and free cash flow for 2026 and 2027 are estimated. Capex: Capital expenditure. E: Estimated. Hyperscalers' free cash flow include Amazon, Meta, Microsoft and Alphabet.

Active management has historically outpaced when valuations soar

Average 3-year forward returns when S&P 500 CAPE ratio was 35x–45x (%)

Table compares  average 3-year  forward returns  when S&P 500  CAPE ratio was  35 times to 45  times, measured  in percentages.  The S&P 500  Index generated  an average  forward 3-year  return of  negative 1.5%.  Average actively  managed funds  generated an  average forward  3-year return of  negative 1.2%.  Capital Group  American Funds  mutual funds  generated an  average forward  3-year return of  3.9%.

S&P 500 cyclically adjusted price-to-earnings (CAPE) ratio

Line chart shows the S&P 500 cyclically adjusted price-to-earnings (CAPE) ratio from 1970 through 2026. The CAPE ratio fluctuates between roughly 7 times and 45 times earnings over the period, reaching notable peaks around the late 1990s technology bubble (above 40) and again in recent years. A shaded band between approximately 35 times and 45 times earnings highlights historically elevated  valuation levels. After declining to singledigit levels in the 1970s and recovering through the 1980s and 1990s, the CAPE ratio surged during the dot-com era, fell in the early 2000s, and then trended higher over the past decade. The most recent reading is around 40, placing the S&P 500 near the upper end of its historical valuation range.

Sources: Capital Group, S&P Global, Shiller Data, Morningstar. S&P 500 benchmarked mutual funds with history dating back to January 31, 1970, based on Class F-2 shares. CAPE ratio can help assess whether an index is overvalued, undervalued or fairly valued. For further details, see footnotes and important information. As of June 30, 2026.

Markets seem convinced on the AI future. What if they’re wrong?

See how Capital Group is approaching this unique market moment in a letter from our CIO Martin Romo.

How Capital Group can help support resilience

The question is not whether AI will create value, but whether any single theme should dictate the shape of a portfolio. An active approach can help investors both participate in powerful innovation and gain differentiated exposure to other growth areas.

Three-column table presents the investment focus of three Capital Group exchange-traded funds. The first column,  titled, “Participate with growth,” features the CGGR – Capital Group Growth ETF and states the fund can help seek growth outside the style box. The investment focus is within U.S. growth, seeking to invest in companies that may offer superior opportunities for growth without index constraints.  The second column, titled “Defend with dividends,” features the CGDV – Capital Group Dividend Value ETF and states the fund can help add value or income exposure. The investment focus is across U.S. equity styles, and it seeks both growth and income opportunities without rigid style limitations.  The third column, titled “Diversify with international,” features the CGNG – Capital Group New Geography Equity ETF and states that the fund can help increase global exposure. The investment focus is across geographies, and it seeks growth with a focus on emerging markets while maintaining exposure to developed markets.

Our funds have not often lagged their benchmarks

Over 3- and 5-year monthly rolling periods on average, Capital Group American Funds equity-focused mutual funds:

Two donut charts show  the persistence of Capital  Group American Funds  equity-focused mutual  funds’ relative  performance over rolling  3- and 5-year monthly  periods. The left chart  shows the funds lagged  their benchmarks in  approximately one-third  of periods. The right chart  shows that after those  periods of lagging, the  funds subsequently  outpaced their  benchmarks in about  two-thirds of periods.

In all subsequent periods after lagging their benchmarks, these funds exceeded their benchmarks by an annualized 139 bps and 165 bps in 3- and 5-year periods, respectively.
 

Sources: Capital Group, Morningstar. As of June 30, 2026. Bps: Basis points. In 3-year periods, these funds lagged their benchmarks 36% of the time, and in subsequent periods outperformed 60% of the time. In 5-year periods, these funds lagged their benchmarks 31% of the time, and in subsequent periods outperformed 63% of the time. This analysis is based on Class F-2 shares at net asset value and includes all the equity-focused American Funds® mutual funds with 36 or more available rolling monthly 10-year return observations, from which we deem sufficient to draw relevant statistical observations. Start date is January 2, 1934, with subsequent funds added with their inception dates.

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About Capital Group

"The Capital System was not designed for easy markets. It was designed for markets like this one."
 

Martin Romo
Chair and chief investment officer

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Index comparisons:
 

AMCAP Fund, American Mutual Fund, Fundamental Investors, The Growth Fund of America, The Investment Company of America and Washington Mutual Investors Fund (S&P 500 Index); American Balanced Fund (60% S&P 500/40% Bloomberg U.S. Aggregate indexes); American Funds Global Balanced Fund (Global Balanced Historical Benchmarks Index); Capital Income Builder (70% MSCI ACWI/30% Bloomberg U.S. Aggregate indexes); The Income Fund of America (65% S&P 500/35% Bloomberg U.S. Aggregate indexes); The New Economy Fund (MSCI All Country World Index); New World Fund (New Geography/New World Historical Benchmarks Index); American Funds International Vantage Fund (MSCI EAFE Index); American Funds Global Insight Fund (MSCI World Index); American Funds Developing World Growth and Income Fund (MSCI Emerging Markets Index); Capital World Growth and Income Fund (Capital World Growth and Income Fund Historical Benchmarks Index); New Perspective Fund (New Perspective Fund Historical Benchmarks Index); EUPAC Fund (EUPAC Fund Historical Benchmarks Index); SMALLCAP World Fund (SMALLCAP World Fund Historical Benchmarks Index); and International Growth and Income Fund (International Growth and Income Fund Historical Benchmarks Index). Index blends are rebalanced monthly.

 

The current primary benchmark indexes for four funds lacked sufficient history to cover the funds’ lifetimes, so comparable indexes were used during the following periods: The Income Fund of America (12/1/73–12/31/75, 65% S&P 500/35% Bloomberg U.S. Government/Credit Bond indexes); American Balanced Fund (7/26/75–12/31/75, 60% S&P 500/40% Bloomberg U.S. Government/Credit Bond indexes); Capital Income Builder (7/30/87–12/31/87, MSCI World Index); and The New Economy Fund (12/1/83–12/31/87, MSCI World Index).

 

Footnotes/Important information:
 

1Average actively managed return is the average of 2,983 U.S. large cap funds with history dating back to January 31, 1970, using the oldest available share class. Categories include Large Value, Large Blend, Large Growth and is inclusive of open-ended and exchange-traded funds. The methodology rebalances monthly and includes both live and obsolete funds.

 

2Funds included in the analysis are: American Mutual Fund®, Washington Mutual Investors Fund, The Investment Company of America®, Fundamental Investors®, AMCAP Fund® and The Growth Fund of America®.

 

Forward price-to-earnings (P/E) ratio measures a stock’s current price relative to its projected earnings over the next 12 months, reflecting market expectations for future growth.

 

S&P 500 cyclically adjusted price-to-earnings (CAPE) ratio is a valuation measure that adjusts for short-term earnings variability by dividing an index’s current price by the average ofthe prior 10 years of inflation-adjusted earnings to assess an index’s valuation over a full business cycle.

 

S&P 500 Index is a market-capitalization-weighted index of about 500 major U.S. stocks. Includes reinvested dividends but excludes fees and taxes.

 

MSCI Emerging Markets Index is a free-float-adjusted market-capitalization-weighted index designed to measure equity market results in global emerging markets.

 

MSCI All Country World Index (ACWI) captures large- and mid-cap representation across developed markets (DM) and emerging markets (EM) countries. The index is float-adjusted and covers approximately 85% of the global investable equity opportunity set.

 

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