We document a robust cross‐sectional positive association across industries between a measure of the economic efficiency of corporate investment and the magnitude of firm‐specific variation in stock returns. This finding is interesting for two reasons, neither of which is a priori obvious. First, it adds further support to the view that firm‐specific return variation gauges the extent to which information about the firm is quickly and accurately reflected in share prices. Second, it can be interpreted as evidence that more informative stock prices facilitate more efficient corporate investment.

Better investor protection could lead corporations to undertake riskier but value‐enhancing investments. For example, better investor protection mitigates the taking of private benefits leading to excess risk‐avoidance. Further, in better investor protection environments, stakeholders like creditors, labor groups, and the government are less effective in reducing corporate risk‐taking for their self‐interest. However, arguments can also be made for a negative relationship between investor protection and risk‐taking. Using a cross‐country panel and a U.S.‐only sample, we find that corporate risk‐taking and firm growth rates are positively related to the quality of investor protection.