This paper studies how peer performance affects firms’ earnings management decisions. Using peer firms’ idiosyncratic returns as an exogenous peer performance measure and the instrumental variable approach, we find that higher peer performance leads to higher discretionary accruals. This effect is salient for both industry leaders and followers and is robust to alternative discretionary accrual measures and alternative peer definitions. We examine two mechanisms through which peer performance affects firms’ earnings management. We find that analysts revise their earnings forecasts according to peer performance and that when peer performance is higher, firms are less likely to meet or beat analyst consensus without managing earnings. This evidence suggests a capital market pressure mechanism. In addition, the effect of peer performance is more pronounced in firms using relative performance evaluation, suggesting a compensation pressure mechanism. In sum, our evidence suggests that managers report opportunistically to match peer performance.

Unlike traditional asset categories (e.g., industry classifications) that are generally defined clearly, some groups of stocks are tied to certain loosely defined “concepts” (e.g., e-commerce). When investors find it difficult to analyze ambiguous concept-oriented information, information diffuses slowly, creating “concept momentum”. Based on unique concept data in the Chinese stock market, this study constructs a concept-momentum strategy that involves buying stocks from past winning concepts and selling stocks from past losing concepts, which can generate pronounced abnormal returns. Neither risk factors, firm-level momentum, nor industry-level momentum can explain concept momentum. Furthermore, we find that both the underreaction and cross-stock lead-lag effect channels can cause slow information diffusion and drive concept momentum. Moreover, the concept momentum effect is stronger for relatively ambiguous concepts, for concepts that attract less investor attention, and following high-sentiment periods.