Reclaiming Fiduciary Duty: ESG, Wall Street Fee Minimalism, and the Case for Pension Divestment

Authors

• Thomas Murray, State Leadership InitiativeFollow
• R. Alexander AcostaFollow

Abstract

This Article examines two forces that have distorted the fiduciary obligations of American pension trustees: (1) ESG activism by the dominant index fund managers and (2) the fee-minimalism argument those same managers have deployed to discourage divestment. Part I establishes the legal architecture of fiduciary duty under ERISA and trust law, centering on the independent duties of loyalty and prudence. Part II traces the history of how ESG considerations migrated from the periphery of investment practice to institutional orthodoxy through the influence of investment consultants, global coalitions, and Department of Labor subregulatory guidance. Part III documents how ESG stewardship by BlackRock, Vanguard, and State Street—which collectively manage roughly $25 trillion in assets—creates concrete financial risks for pension beneficiaries, both by depressing portfolio company value through activist proxy voting and by threatening the fossil fuel revenue streams on which some state pension systems indirectly depend. Drawing on the landmark ruling in Spence v. American Airlines and the antitrust litigation in Texas v. BlackRock, Part IV argues that the duty of loyalty may permit pension fiduciaries to divest from asset managers whose ESG-motivated stewardship conflicts with beneficiaries’ exclusively financial interests. Parts V and VI then confront what this Article terms “Wall Street fee minimalism”—the claim that the Big Three’s cost advantages make divestment a per se breach of prudence. By disaggregating the multi-billion-dollar cost projections that underpin this argument, the Article demonstrates that targeted manager replacement generally entails only a modest ongoing fee differential, a one-time transition expense, and routine administrative costs. The Article concludes that the duty of prudence, properly understood, requires a more comprehensive approach. Fiduciaries must evaluate ESG-induced risks to revenue and portfolio value, alongside purported management costs. Thus, a fiduciary who conducts that process and concludes divestment is warranted will have acted within the bounds of prudent judgment.

Recommended Citation

Thomas Murray & R. Alexander Acosta, Reclaiming Fiduciary Duty: ESG, Wall Street Fee Minimalism, and the Case for Pension Divestment, 79 SMU L. Rev. F. 107 (2026)