Neuberger Berman Notes AI Risk In U.S. Stocks
The firm warns that artificial intelligence companies now account for half of the marginal risk in the U.S. stock market.
Updated on Oct. 21, 2026 in Investing
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On October 5, 2026, Neuberger Berman reported that artificial intelligence companies represent 25% to 28% of U.S. stock market value. However, the firm estimated these assets contribute 50% of the marginal risk in the current market.
Why it matters
The significant gap between market value and risk exposure for AI-related firms suggests an elevated level of portfolio concentration. This imbalance highlights how technology-led growth impacts investor risk profiles amid rising Treasury yields.
AI-related firms account for 50% of marginal market risk, despite making up only 25% to 28% of total U.S. equity value. These figures reflect market conditions analyzed as of October 5, 2026.
The players
Neuberger Berman
Neuberger Berman is a private, independent, employee-owned investment management firm that provides global equity, fixed income, and private equity investment solutions.
The details
Rising Treasury yields and a resilient economy have fueled recent equity growth, though Neuberger Berman suggests this creates challenges for bond diversification. The firm maintains a constructive outlook on risk assets for the remainder of the year despite these identified structural risks.
Timeline
October 5, 2026: Neuberger Berman released its analysis of AI sector risk and value.
Q4 2026: The firm maintains a constructive outlook on risk assets for the final quarter.
Market Dynamics
This concentration of risk follows a pattern set by the 2000 dot-com bubble concentration where index performance became heavily tied to a narrow group of high-growth technology sectors. The data indicates that current AI-driven gains mirror past cycles of intense sectoral reliance.
Retail investors may need to evaluate whether their portfolios are overly concentrated in technology-heavy index funds that are susceptible to AI sector volatility. With Treasury yields rising, traditional bond-based diversification strategies may not offer the same protection they have provided in previous market cycles.
The takeaway
Investors should review their exposure to highly concentrated tech sectors to ensure their asset allocation aligns with current risk tolerances. Maintaining a diversified strategy is essential when market growth is driven by a small group of high-valuation firms.
Further reading
For more on managing portfolio exposure in volatile markets, visit our Investing section.
Source note: This article includes information reported by TokenPost.
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