Active equity mutual funds that own shares in product-market competitors have higher risk-adjusted returns, even after fees. This positive association comes from their common ownership positions, and remains robust after controlling for industry concentration, common stock selection, and the tendency to invest in firms with more common ownership. These funds charge higher fees and are active voters: more likely to vote against executive pay-for-performance and for directors with existing directorships in competitors. Our findings suggest that actively managed equity mutual funds are incentivized to soften product-market competition, and proxy voting may serve as a mechanism for influencing corporate policy.

This paper explores how the emergence of generative artificial intelligence is reshaping the information environment in capital markets. Leveraging an unexpected ban on ChatGPT in Italy, we examine its impact on the information processing capabilities of market participants. We employ metrics for AI-generated text detection to show that the ban coincides with decreased AI usage by domestic financial analysts and fewer earnings forecasts issued relative to foreign analysts covering the same firm. The negative effects are more pronounced among analysts whose pre-ban reports are more consistent with AI use or analysts with a technical background. The ban also diminishes forecast accuracy, increases reliance on industry-specific information, and reduces information efficiency. Furthermore, investor reactions to earnings announcements become more pronounced, and bid–ask spreads widen, reflecting lower market efficiency.