This paper analyzes the asset pricing and portfolio implications of an important barrier to sustainable investing: uncertainty about the corporate ESG profile. In equilibrium, the market premium increases and demand for stocks declines under ESG uncertainty. In addition, the CAPM alpha and effective beta both rise with ESG uncertainty and the negative ESG-alpha relation weakens. Employing the standard deviation of ESG ratings from six major providers as a proxy for ESG uncertainty, we provide supporting evidence for the model predictions. Our findings help reconcile the mixed evidence on the cross-sectional ESG-alpha relation and suggest that ESG uncertainty affects the risk-return trade-off, social impact, and economic welfare

We examine voluntary disclosure decisions when firms are uncertain about audience preferences and are risk averse. In contrast to classic “unraveling” results, some firms remain silent in equilibrium. Silence is safer than disclosure; silence reduces the sensitivity of a firm’s payoff to audience preferences. Increases in firm (audience) risk-aversion reduce (increase) disclosure. Our model explains why some firms do not disclose earnings breakdowns, executive compensation, or Environmental, Social, and Governance (ESG) performance when they face diverse audiences, and why they disclose less under regulatory rules mandating that disclosure be entirely public