Ang, Hodrick, Xing, and Zhang (2006a) show that stocks with high idiosyncratic return volatility tend to have low future returns. This paper further documents that idiosyncratic volatility is inversely related to future earning shocks, and more importantly, that the return-predictive power of idiosyncratic volatility is induced by its information content about future earnings. We examine various explanations of the triangular relation among idiosyncratic volatility, future earning shocks, and future stock returns. Our results show that the idiosyncratic volatility anomaly is not a simple manifestation of previously documented market anomalies related to excessive extrapolation on firm growth, over-investment tendency, accounting accruals, or investor underreaction to earnings news. On the other hand, there is evidence that the idiosyncratic volatility anomaly is related to corporate selective disclosure, and the anomaly is stronger among stocks with a less sophisticated investor base.

Previous research shows that bank information production mitigates asymmetric information problems. However, this literature has ignored the concern that firms with better growth prospects are more vulnerable to bank rent extraction. This paper points out that funding competition from new equity as an effective natural mechanism solves this important concern. Using Japanese data from 1983 to 1997, we show that the relationship between loan-to-debt ratio and growth, while starting significantly negative (consistent with holdup theory), turns significantly positive towards the high end of the growth spectrum. We confirm that high-growth firms raise more new equity than do low growth firms and use more equity relative to bonds in external finance. This is consistent with a generalized Myers–Majluf framework. These results suggest that for high growth firms, when competition from public debt lessens due to increased growth-based valuations, competition from new equity steps in to restrain bank rent extraction.