Key Takeaways
- • Robin Wigglesworth, Financial Times Alphaville editor and author of *Trillions*, has published a new book titled *Fabulous Debt: The Epic Story of How Bonds Built the Modern World* (September 2026), exploring the historical evolution and systemic importance of bond markets in global economic development.
- • The junk bond market emerged as a foundational investment thesis based on portfolio diversification principles: while individual credits carry default risk, a sufficiently broad and diversified basket of lower-rated bonds generates attractive risk-adjusted returns—a strategy that built "a pretty incredible junk bond empire."
- • Bonds have played a quiet but critical structural role in financing and enabling the development of modern economies, serving as a counternarrative to equity-focused investment narratives and demonstrating the often-overlooked importance of fixed-income markets in capital formation.
Summary
Robin Wigglesworth, a veteran financial journalist and editor of the Financial Times' influential Alphaville blog, has authored *Fabulous Debt: The Epic Story of How Bonds Built the Modern World*, a comprehensive examination of bond market history released in September 2026. The book follows his previous work *Trillions*, which analyzed the evolution and future trajectory of passive investing.
In discussing the genesis of modern bond markets, Wigglesworth highlights the junk bond market as a pivotal case study. The core investment insight that underpinned this market's development centers on diversification: while individual lower-rated bonds carry meaningful default risk, a sufficiently broad portfolio of such instruments generates attractive returns. This fundamental realization—that disparate credits, some of which will inevitably default, collectively produce outsized gains when held within a diversified basket—became the cornerstone principle driving what Wigglesworth characterizes as "a pretty incredible junk bond empire."
The broader thesis of *Fabulous Debt* positions bonds as a historically underappreciated but systemically essential component of global economic infrastructure. Rather than focusing on equity markets or dramatic individual transactions, Wigglesworth's work emphasizes how bond markets have "quietly built the modern world," financing infrastructure, corporations, and governments across centuries. This perspective challenges conventional narratives that emphasize stock market dynamics and highlights fixed-income markets as equally—if not more—critical to capital formation and economic development.
For institutional investors and asset managers, the book offers a historical framework for understanding how debt markets function as primary mechanisms for mobilizing and deploying capital at scale, with implications for contemporary portfolio construction and risk management strategies.
In discussing the genesis of modern bond markets, Wigglesworth highlights the junk bond market as a pivotal case study. The core investment insight that underpinned this market's development centers on diversification: while individual lower-rated bonds carry meaningful default risk, a sufficiently broad portfolio of such instruments generates attractive returns. This fundamental realization—that disparate credits, some of which will inevitably default, collectively produce outsized gains when held within a diversified basket—became the cornerstone principle driving what Wigglesworth characterizes as "a pretty incredible junk bond empire."
The broader thesis of *Fabulous Debt* positions bonds as a historically underappreciated but systemically essential component of global economic infrastructure. Rather than focusing on equity markets or dramatic individual transactions, Wigglesworth's work emphasizes how bond markets have "quietly built the modern world," financing infrastructure, corporations, and governments across centuries. This perspective challenges conventional narratives that emphasize stock market dynamics and highlights fixed-income markets as equally—if not more—critical to capital formation and economic development.
For institutional investors and asset managers, the book offers a historical framework for understanding how debt markets function as primary mechanisms for mobilizing and deploying capital at scale, with implications for contemporary portfolio construction and risk management strategies.
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