Recent sociological research suggests that culturally tight environments enforce strong social penalties for mistakes. I find that such culturally tight environments incentivize managers to suppress negative information, increasing stock price crash risk. Opaque financial disclosure is a channel through which cultural tightness affects managerial bad news hoarding. Labor and capital market pressures strengthen the positive effect of cultural tightness on crash risk. The instrumental regressions using labor-intensive agriculture and ethnic homogeneity as instruments confirm a positive tightness-crash relationship. Finally, changes in environments because of headquarters relocations affect managerial tendencies to withhold bad news, resulting in changes in crash risk levels.