Workplace Voice Shocks and Cross Market Stakeholder Reactions Evidence from Labor Organizing Events and Option Prices in Public Firms

• Felipe Azevedo

  Departamento de Administração, Universidade Federal do Piauí, Campus Ministro Petrônio Portella, Ininga, Teresina 64049-550, Brazil

  Author

• Bruno Tavares

  Departamento de Ciências Contábeis, Universidade Federal do Rio Grande, Avenida Itália Km 8, Carreiros, Rio Grande 96203-900, Brazil

  Author

• Diego Martins

  Departamento de Gestão de Negócios, Universidade Federal do Tocantins, Avenida NS 15, Quadra 109 Norte, Plano Diretor Norte, Palmas 77001-090, Brazil

  Author

Workplace voice has become a visible source of stakeholder pressure in public firms, yet the market consequences of such pressure are difficult to separate from ordinary labor cost expectations and broader social attention. This study examines how employees, customers, equity investors, and option markets react to labor-organizing shocks in publicly traded firms. The empirical setting consists of 1,286 establishment-level labor-organizing events linked to 143 U.S. public firms from 2014 to 2024. The data combine election petitions, unfair-labor-practice allegations, employee-text sentiment, consumer mobility, payment-card spending proxies, equity returns, analyst forecast revisions, and option-implied volatility. The analysis applies matched difference-in-differences, synthetic controls, intraday abnormal-volume tests, double machine learning, and causal forests. The evidence indicates that market reactions depend on whether employee voice is interpreted as a localized labor-cost issue or as a signal of broader operating weakness. On average, labor-organizing shocks reduce three-day abnormal equity returns by 0.42%, increase thirty-day option-implied volatility by 2.31%, and reduce analyst margin forecasts by 0.19 percentage points. However, firms with strong pre-event employee sentiment, low wage compression, and credible labor-relations history experience statistically muted equity reactions. Customer reactions are also heterogeneous: consumer foot traffic declines after highly publicized conflict events but does not decline after procedural organizing events with low confrontation. Causal-forest estimates show that negative market reactions are concentrated in high-turnover service industries where employee dissatisfaction predicts subsequent staffing instability. The findings suggest that workplace voice is priced when investors infer operational fragility rather than when they observe labor organization alone.

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