We use the controversial aspect of insider trading to analyze the impact of local social norms on insiders’ profits. We argue that religiosity is a source of social norms curbing self-interested behavior and, accordingly, it limits corporate insiders’ opportunistic trading on private information. Our results confirm that trades by insiders in firms located in more religious areas are followed by lower profits, those insiders are less likely to trade on future earnings news, and their trades are less likely to be opportunistic. The effect of religion on profitability of insider trading holds across different levels of disclosure environments and is more pronounced in firms with poor corporate governance. Overall, we offer new insights into the effect of social norms on individuals’ financial decisions.

We study the information content of corporate insiders’ trades after earnings announcements. We find little evidence that insiders trade on foreknowledge of material information in the post-SOX period. Conditioning on short-selling activity as a proxy for demand of arbitrageurs who exploit short-term mispricing, we show that insiders profit from selling because of their ability to exploit short-term mispricing after earnings releases. In contrast before SOX, insiders do take advantage of foreknowledge of material information while selling. Insider purchases are based on foreknowledge of material information both before and after SOX, but they are rare and have small economic magnitude.