We are among the first to investigate how Generative AI (GenAI) shapes investors' trading activities. Using an AI‐sentiment measure extracted from earnings‐call transcripts to proxy for textual signals, we find notable shifts in trading behaviors around earnings calls. Before the wide deployment of ChatGPT, short selling was aligned with AI‐sentiment, whereas retail trading was not. However, following ChatGPT's deployment, the alignment of retail traders with AI‐sentiment significantly increases, while the alignment of short sellers weakens, albeit insignificantly. Stocks with higher information processing costs exhibit a more pronounced increase in retail trading alignment, scenarios where retail investors are likely to benefit more from AI. Using retail‐AI alignment as a proxy for the extent to which retail investors trade based on AI signals, we show that information asymmetry declines and retail investors' trading profitability improves, whereas short sale profitability declines in high retail‐AI alignment stocks. Exogenous outages reduce the alignment between retail trading and AI‐sentiment, allowing us to draw causal inferences. Collectively, this study suggests that AI is a promising technology for narrowing the information gap in the trading of complex textual financial disclosures between investor classes with clear disparities in the ability to process public disclosures.

We study the impact of an online market’s policy (environmental policy) offering entrepreneurs the option to disclose their environmental engagement on entrepreneurship outcomes, using Kickstarter as a laboratory. Following the policy’s implementation, 32.4% of entrepreneurs opted to disclose their environmental commitments. Using the passage of the environmental policy as an instrument, we show that environmental commitment improves funding outcomes, with the funding success rate increasing by 13.2% and the pledged funding ratio by 8.7%. Environmental commitment also attracts more environmentally conscious backers and brings in new backers, which likely contributes to these improved outcomes. However, environmental commitment does not have a material impact on the ultimate project success rate and significantly delays project delivery. Overall, the evidence suggests that Kickstarter’s nudge policy encourages entrepreneurs’ environmental engagement and helps them expand access to environmentally conscious backers by internalizing backers’ environmental preferences.