Make Sustainability a Financial Variable

For nearly two decades, the corporate case for ESG has been built on a confident proposition that virtue reliably produces value. From Davos panels to CEO letters and sustainability indices, the refrain has been consistent. Firms that reduce environmental harm, improve labor practices, and strengthen governance should face fewer disruptions, earn greater stakeholder trust, and build more durable competitive advantage. If that logic holds, markets should gradually reward companies whose ESG performance improves in ways that are economically material, through higher expected cash flows, lower downside risk, or a lower cost of capital.

Yet a persistent puzzle remains. The volume of ESG activity has expanded rapidly, but the link between measured ESG progress and equity pricing is often weak. In our recent statistical study of publicly listed firms in the Gulf region over 15 years and more than 4,400 firm month observations, changes in sustainability scores had almost no measurable association with stock returns, either contemporaneously or with lags up to two years. In the full sample, a 10 point increase on a 0 to 100 ESG scale corresponds to roughly a 0.005 percentage point change in monthly returns.

This result does not prove that sustainability fails to create value. It suggests something narrower and more operational. The ESG ecosystem frequently generates information that is not decision useful for valuation. Markets do not price intentions, narratives, or broad score improvements. They price expected cash flows and the distribution of those cash flows, including tail risk, as well as the discount rates applied to them. Much ESG work never reaches that level of translation.

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Read the full article in California Management Review.