Robin Wigglesworth on the Creation of the Index Fund (Podcast)

Episode Summary

Executive Summary: Robin Wigglesworth discusses his book 'Trillions' and the rise of passive investing, tracing how index funds and ETFs reshaped finance through accident, luck, and institutional innovation. The conversation covers Vanguard, State Street, BlackRock, journalism, quantitative investing, and criticisms of passive products, arguing that low-cost indexing has broadly benefited investors and will keep gaining share.

Main Topics: Origins of Robin Wigglesworth and financial journalism (Priority: 3/5): Wigglesworth explains how he moved from LSE and Middle East studies into journalism, landing in Dubai covering Islamic finance and later Bloomberg and the FT. Writing 'Trillions' and researching passive investing history (Priority: 5/5): He describes the book as a synthesis of interviews, archives, and prior histories, aimed at explaining the rise of passive investing through personalities and institutions. Vanguard, Jack Bogle, and the accidental rise of indexing (Priority: 5/5): The discussion emphasizes that Vanguard’s mutual structure and Bogle’s embrace of indexing were partly accidental, driven by corporate conflict, legal structure, and timing. State Street, ETFs, and the iShares/BlackRock lineage (Priority: 5/5): They trace the invention of ETFs from Amex and State Street to Barclays Global Investors, then to BlackRock’s highly successful acquisition of BGI and iShares. Critiques of passive investing and common ownership (Priority: 4/5): Wigglesworth addresses concerns about market concentration, antitrust-like common ownership, and whether passive giants could influence competition or pricing. Market behavior, retail trading, factor investing, and quant finance (Priority: 4/5): The conversation contrasts passive inflows with meme-stock and retail trading surges, and covers the long slump in value/factor strategies and the broader future of systematic investing. Journalism, career advice, and the business of news (Priority: 3/5): Wigglesworth reflects on journalism culture, the changing quality of financial reporting, mentorship, and advice for aspiring financial journalists.

Key Arguments: Passive investing became dominant not because of a single master plan, but through a series of accidents, structural constraints, and opportunistic innovation. Jack Bogle was a crucial figure, but Vanguard’s mutual ownership structure and the eventual embrace of indexing were shaped by internal conflict and legal workarounds as much as ideology. ETF and index-fund success depended on institutions recognizing the business potential of scale and distribution; State Street initially underestimated what it had, while BGI/BlackRock scaled aggressively. BlackRock’s acquisition of BGI/iShares was one of the greatest M&A deals in financial history because it bought the infrastructure of future growth at a relatively low price. Criticism of passive investing often confuses legitimate questions about concentration and incentives with exaggerated claims about conspiracy or cartel behavior. Common ownership theory has some theoretical plausibility, but the evidence remains mixed, and current fund ownership is still only a minority of total market ownership. March 2020 was a major stress test that showed bond ETFs were more resilient than many skeptics expected, while traditional bond mutual funds may have been more vulnerable. The long-run case for passive investing is strong because low fees and broad diversification have saved investors and retirement savers enormous amounts of money. Factor investing and value strategies can work over long horizons, but the behavioral pain of extended drawdowns makes them difficult for ordinary investors to hold. Quant investing is likely to remain important because markets are becoming more systematic and more technology-driven over time. Direct indexing has promise because investors increasingly want customization, but it is unlikely to replace plain-vanilla broad-market funds at scale. Financial journalism has improved over time, especially after the financial crisis, because more talented and better-trained people now enter the field.

Data Points: BlackRock assets under management: a little under $9.5 trillion - Used to illustrate BlackRock’s scale after acquiring BGI/iShares and benefiting from passive growth. BlackRock acquisition price for BGI: $13.5 billion in cash and equity - Agreed purchase price for Barclays Global Investors, later described as one of the best M&A deals in finance. Final acquisition value at closing: around $15 billion - BlackRock shares had risen by the time the BGI deal closed in late 2009. BlackRock market capitalization: just under $140 billion - Used to show the value created by the BGI/iShares acquisition and passive-investing expansion. ETF distribution of votes: around a quarter of all votes cast on average in the US - Wigglesworth cites this as evidence of growing ownership concentration among large index managers. Indexing fee savings in the US: $350 billion over the past 25 years - A cited estimate of the money saved by investors from lower-fee index products. Passive share of mutual fund and ETF world: more than half - He notes passive products now dominate the mutual fund and ETF universe, though they remain a minority of total investing dollars. Passive inflows in the current year: close to $500–600 billion - He contrasts strong passive inflows with the active trading boom. Active fund inflows in the current year: about $150 billion - Used to show active has had a bounce, but passive still dominates flows. Value investing underperformance: more than a decade - He uses the prolonged value/growth gap to explain why factor strategies are hard to stick with. Nobel laureates consulted for WFIA: 1.6 Nobel laureates - A colorful way of describing the academic depth behind Wells Fargo Investment Advisors. Number of major US airline carriers today: about 4 - Used as an example in the common ownership/competition discussion. Historical number of major US airline carriers: about 14 - Used to show consolidation and the weakness of using airlines alone as evidence of anticompetitive effects. Podcast history: nearly 400 prior discussions - Barry Ritholtz promotes the Masters in Business archive near the end of the interview.

Pivotal Quotes: "strategy follows structure" — Robin Wigglesworth: Explaining how Vanguard’s mutual ownership and eventual indexing path were driven by institutional structure and circumstance. "the dirty secret is that nobody used to dream of being a financial journalist when they grew up" — Robin Wigglesworth: On how the talent pool and quality of financial journalism improved after the financial crisis. "I think the data is a really hard taskmaster here" — Robin Wigglesworth: On why passive investing’s long-term performance and low-cost advantages are difficult to dispute.

Implications: Passive investing remains a structural force in markets: cheap, scalable, and increasingly global. Its growth boosts investor returns but also raises long-term questions about concentration, governance, and market structure.