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ECONOMIC UPDATE

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September 2026 | Monthly Economic Update

Source: FactSet

Global markets advanced in August as solid corporate earnings and continued AI investment supported equities. Commodity markets also performed strongly, while bonds posted modest gains as markets adjusted to shifting interest-rate expectations.

U.S. equities rose 2.7% during the month, bringing year-to-date returns to 13.1%. Leadership continued to broaden beyond the largest technology companies, with both growth and value stocks advancing. Energy, health care, materials, and technology were among the stronger-performing sectors, while smaller companies lagged large caps amid interest-rate uncertainty. Strong second-quarter earnings and continued AI investment supported equities, though investors remained selective within technology names.

International equities continued to perform well in August, extending their gains for the year. Developed markets are up 14.2% year-to-date, while emerging markets rebounded during the month and are now up 24.4% YTD. AI-related companies in Taiwan and South Korea remained important contributors, as semiconductor manufacturers continued to benefit from global investment in AI infrastructure. The softer U.S. dollar provided an additional tailwind to non-U.S. returns, although performance remains concentrated in technology and semiconductor-related areas.

Fixed income markets posted modest gains in August, with U.S. bonds rising 0.4% but remaining slightly negative year-to-date. High-yield bonds were a standout as investors continued to favor credit, while short-term Treasury yields moved higher on shifting expectations for Federal Reserve policy. Longer-term yields were broadly stable, although inflation and heavy government borrowing continued to weigh on the outlook for bonds.

Commodities were among August’s strongest performers, with the Bloomberg Commodity Index gaining 7.4% and rising 32.1% year-to-date. Crude oil edged higher as ongoing conflicts raised concerns about potential supply disruptions. Gold was also strong, rallying 9.5% in August and bringing its year-to-date return to 2.0% as investors sought protection from inflation and geopolitical risks.

A globally diversified 60/40 portfolio is up 8.6% year-to-date. Strong equity returns have more than offset modest weakness in core bonds, highlighting the benefits of diversification as leadership continues to broaden across markets. 

Source: FactSet

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LAST MONTH’S RIDDLE:

I can never be thrown but I can be caught. Ways to lose me are always being sought. What am I?

ANSWER: A cold.

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INDEX DEFINITIONS

Asset Class

Index Bloomberg Commodity

Definition

Commodities

Bloomberg Commodity

Measures the performance of a broadly diversified exposure to physical commodities via futures contracts.

Emerging Markets Bonds

Bloomberg Emerging Markets USD Aggregate

Measures the performance of hard-currency emerging markets debt, including fixed and floating-rate USD-denominated debt issued from sovereign, quasi-sovereign, and corporate emerging markets debt.   

Emerging Markets (EM) Equity

MSCI Emerging Markets

Measures the equity market performance of countries considered to represent emerging markets.  

Global 60/40 Index Blend

60% MSCI ACWI, 40% Bloomberg Global Aggregate

Measures the performance of a blend of global equities and global bond indexes used as a benchmark for balanced portfolios.

Global Equity

MSCI ACWI

Measures large- and mid-cap equity performance of developed and emerging markets. Represents approximately 85% of the global equity investment universe.

Global Bonds

Bloomberg Global Aggregate

Measures the performance of global, investment-grade debt from 24 local currency markets. This benchmark includes Treasury, government-related, corporate, and securitized fixed-rate bonds from both developed and emerging markets issuers.

Gold

Bloomberg Gold – Total Return

Measures the performance of futures contracts on gold and is quoted in USD.

International Bonds

Bloomberg Global Aggregate ex-USD

Measures the performance of investment-grade debt from 24 local currency markets. This multi-currency index includes Treasury, government-related, corporate, and securitized fixed-rate bonds from both developed and emerging markets issuers. It excludes bonds issued in USD.

International Developed Equity

MSCI EAFE

Measures the equity performance of countries considered to represent developed markets, excluding the US and Canada.

Sector – Materials

S&P 500 Sector Materials

Measures the performance of companies involved in industries such as: chemicals, construction materials, containers and packaging, metals and mining, and paper and forest products.

U.S. Bonds

Bloomberg US
Aggregate

Measures the performance of USD-denominated, investment-grade, fixed-rate taxable bond market of SEC-registered securities. The index includes Treasury bonds, Government-related Corporate, MBS (agency fixed-rate and hybrid ARM pass-throughs), ABS, and CMBS sectors.

US Equity

S&P 500

Measures the performance of 500 leading companies in the US Constituents generally have a market cap above $5 billion and represent approximately 80% of the investable market.

US REIT

S&P Composite 1500 Real Estate

Measures the performance of publicly traded US real estate securities, such as real estate investment trusts (REITs) and real estate operating companies.

Important Information


This is for informational purposes only, is not a solicitation, and should not be considered investment, legal or tax advice. The information has been drawn from sources believed to be reliable, but its accuracy is not guaranteed and is subject to change. Investors seeking more information should contact their financial advisor. Financial advisors may seek more information by contacting AssetMark at 800-664-5345.


Investing involves risk, including the possible loss of principal. Past performance does not guarantee future results. Asset allocation cannot eliminate the risk of fluctuating prices and uncertain returns. There is no guarantee that a diversified portfolio will outperform a non-diversified portfolio. No investment strategy, such as asset allocation, can guarantee a profit or protect against loss. Actual client results will vary based on investment selection, timing, market conditions, and tax situation.


It is not possible to invest directly in an index. Indexes are unmanaged, do not incur management fees, costs, and expenses, and cannot be invested in directly. Index performance assumes the reinvestment of dividends.
Investments in equities, bonds, options, and other securities, whether held individually or through mutual funds and exchange-traded funds, can decline significantly in response to adverse market conditions, company-specific events, changes in exchange rates, and domestic, international, economic, and political developments.


Bloomberg® and the referenced Bloomberg Index are service marks of Bloomberg Finance L.P. and its affiliates
(collectively, “Bloomberg”) and are used under license. Bloomberg does not approve or endorse this material nor guarantees the accuracy or completeness of any information herein. Bloomberg and AssetMark, Inc. are separate and unaffiliated companies.


AssetMark, Inc. is an investment adviser registered with the U.S. Securities and Exchange Commission. AssetMark and third-party strategists and service providers are separate and unaffiliated companies. Each party is responsible for their own content and services.


©2026 AssetMark, Inc. All rights reserved.

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