U.S. public pension funds hold more than $5 trillion. Whether they should weigh environmental, social, and governance factors has become a partisan fight. This paper argues that ESG screening strengthens long-term solvency by pricing risk, not by trading returns for ethics.
Our approach
The paper traces ESG in public pensions from the first screened mutual fund in 1971 through the exclusion era, apartheid and tobacco divestment, to today's integration approach, where funds score companies rather than blacklist industries.
It then maps the current divide across three groups of states, sets the fiduciary and economic objections against the evidence on risk-adjusted returns, and closes with a set of policy recommendations. The argument rests on published research and state records rather than new data, with a full works-cited list of 26 sources.
What the paper finds
- The states have split three ways. Florida pulled $2 billion from BlackRock-managed funds in 2022 and Texas barred contracts with banks it deems to be boycotting fossil fuels or firearms. Colorado and Nevada treat ESG as a secondary criterion applied only where it improves performance. Maine set a 2026 deadline to divest from fossil fuels entirely, CalPERS built an internal ESG team, and New York's Common Retirement Fund is targeting minimal emissions by 2040.
- The costs of getting it wrong are real. Indiana's fiscal office projected a $6.7 billion loss over a decade from constrained diversification. Kansas lost $100 to $200 million on an in-state investment program, Connecticut lost $25 million propping up Colt, and fossil-fuel divestment has been costed at up to 0.27 percent of a portfolio per year.
- The evidence on risk favours ESG. Friede et al.'s meta-analysis found 62.9 percent of studies report a positive link between ESG and financial performance. Firms with strong ESG ratings held up better through COVID-19, and with intangibles now about 90 percent of S&P 500 value, governance failures like Volkswagen's emissions scandal destroy value that never shows on a balance sheet.
- Beneficiaries are largely in the dark. Proxy voting is the sharpest fiduciary question and the least transparent. Roughly 70 percent of beneficiaries, especially younger ones, say they want sustainable investing, yet most cannot see how their fund votes.
- Keep screening out of politics with a federal standard. The paper recommends an ERISA-style rule that permits ESG factors only where they serve financial return, SASB-style disclosure so results can be compared, risk-adjusted performance metrics in place of blanket exclusion lists, and an option for beneficiaries to direct part of their own contributions.
Limitations
- The paper synthesises published research and state records. It does not test ESG performance on the Kentucky system's own portfolio.
- Much of the performance evidence concerns companies, not pension funds. Whether firm-level resilience carries through to fund-level returns after costs is inferred, not measured.
- The state landscape moves quickly. Sources run through 2024, and several of the laws and deadlines cited have since been amended or challenged.