Investors who dislike income inequality are moving their money away from companies with high ratios of CEO-to-worker pay, according to first-of-its-kind research a University of Minnesota professor co-authored.
Tracy Yue Wang, a finance professor at the U's Carlson School of Management, said public companies need to pay attention to this newly revealed pattern that shows inequality-averse investors, including institutional investors, actively rebalance their portfolios to invest in the stocks of firms with low pay disparities.
That sends a "powerful valuation signal to companies" with high pay ratios, whose values, on average, tend to decline after those ratios become public, Wang said.
That could lead to changes in corporate culture and policies that curb pay disparities, she and her co-authors assert. Or investors could directly pressure firms to advance pay equity through voting or governance mechanisms. Investors and capital markets could address income inequality as an alternative to, or in combination with, political measures.

"Our study suggests that investors send a message to firms that, 'We care about income inequality. We dislike large pay dispersion in your company,'" Wang said. "If firms care about investors' reactions, if they care about potentially their cost of capital, they would actually do something to address it, especially if money is flowing out of firms with high dispersion and into firms with low dispersion."
While companies have long had to report CEO compensation, public companies now must disclose CEO-to-worker pay ratios under a Securities and Exchange Commission rule that took effect in 2018.
The new pay-ratio disclosure rule allows investors and other stakeholders to compare for the first time CEO compensation to median worker compensation and assess, at least partly, income differences within a firm. Wang and her co-authors — Yihui Pan of the University of Utah, Elena Pikulina of the University of British Columbia and Stephan Siegel of the University of Washington — analyzed investor reactions to those 2018 pay ratios in a paper published in the Journal of Finance.
Negative responses to high pay ratios from inequality-averse employees, customers and local governments could reduce those firms' future cash flows, Wang and her co-authors found. Firms with high pay ratios could lose investors, which could depress their equity prices and increase the cost of capital.