Capital Allocators• Mar 23, 2026• 1:17:37Interview

Jeremy Grantham – Bubbles, Value Investing, and the Long Game at GMO (EP. 493)

From Capital Allocators

Jeremy Grantham•Co-founder, GMO

Executive Summary

Jeremy Grantham argues the current AI-driven market is a classic 'super bubble', similar to the railroad and internet booms, where a world-changing technology incites an over-investment that will likely end in a significant crash.
He believes the 2022 bear market was an incomplete bubble deflation, interrupted and re-inflated by the excitement around generative AI, creating a unique and historically unprecedented market environment.
Grantham advises investors to avoid the overvalued U.S.
market and instead allocate capital to non-U.S.
stocks, particularly developed value and emerging markets.
He strongly criticizes past Federal Reserve policies, particularly under Alan Greenspan, for creating moral hazard and fueling a series of asset bubbles that have destabilized the financial system.

12 quotes

Concerns Raised

The US stock market, particularly tech, is in a speculative 'super bubble' driven by AI hype.
The bubble's deflation in 2022 was incomplete and has since re-inflated, creating a uniquely dangerous situation.
Federal Reserve policies have created a legacy of moral hazard and serial asset bubbles.
Long-term demographic decline and the economic impact of climate change are underappreciated systemic risks.

Opportunities Identified

Non-U.S. stocks, specifically developed value and emerging markets, are relatively undervalued.
Within the U.S., high-quality companies are the most likely to survive an inevitable market downturn.
Investing in technologies that address climate change and sustainability represents a major long-term opportunity.

Key Themes

The Anatomy of Market Bubbles

Grantham posits that the greatest market bubbles are always associated with transformative, world-changing technologies like railroads, the internet, and now AI. The obvious importance of these innovations creates a speculative fervor and massive capital investment that inevitably gets overdone, leading to a painful bust even for the eventual winners.

This historical framework provides a lens for analyzing the current AI boom, suggesting that even if the technology is revolutionary, the associated stock valuations are likely unsustainable and prone to a major correction.

The AI-Interrupted Bear Market

Grantham argues that the 2022 market decline was on track to be a typical post-bubble crash but was uniquely interrupted by the emergence of generative AI. This new narrative reignited animal spirits, particularly in the 'Magnificent Seven' stocks, preventing the market from fully reverting to its long-term trend value and creating a new, concentrated bubble.

This analysis suggests the market is in uncharted territory, having started a second bubble before the first had fully burst, making the current environment particularly fragile and unpredictable.

Career Risk and Contrarian Investing

The discussion highlights the immense professional and business pressure to avoid being contrarian during a raging bull market, as exemplified by GMO's painful experience during the dot-com bubble. Grantham notes that large investment banks will never advise clients to exit a bubble due to this career risk, reinforcing the difficulty of acting rationally against market euphoria.

This theme underscores the structural incentives within the asset management industry that perpetuate bubbles and makes truly independent, value-oriented thinking both rare and commercially risky.

Critique of Federal Reserve Policy

Grantham launches a sharp critique of Federal Reserve chairs Alan Greenspan and Ben Bernanke, arguing their policies are directly responsible for creating a series of asset bubbles. He specifically cites their opposition to regulating derivatives in the late 1990s as a direct cause of the 2008 Global Financial Crisis, highlighting a pattern of prioritizing market support over long-term stability.

This perspective challenges the conventional view of the Fed's role, suggesting its actions have introduced significant moral hazard and systemic risk into the financial system, with consequences that investors still face today.

Long-Term Global Headwinds

Beyond market cycles, Grantham expresses deep concern over long-term structural issues like demographic decline and climate change. He points to collapsing fertility rates in countries like Japan and South Korea and dedicates his philanthropic efforts to addressing environmental sustainability, viewing these as existential threats to global prosperity.

These macro-level concerns inform his long-term bearish outlook and highlight risks that extend far beyond typical financial analysis, impacting global growth and societal stability.

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Topics

Market Bubbles Jeremy Grantham GMO Value Investing Contrarian Investing AI (Artificial Intelligence)NVIDIA Dot-com Bubble Federal Reserve Alan Greenspan Career Risk Asset Allocation Emerging Markets Climate Change Demographics Magnificent Seven QuantumScape

Processed Apr 6, 2026 yt-dlp + mlx-whisper + Gemini