The Informational Role of Corporate Hedging
研究公司对冲是让财报更不透明、助长内幕交易，还是降低不确定性、削弱信息优势。实证支持后者：对冲降低股价波动、分析师分歧和卖空利润。
We study the informational role of corporate hedging, comparing two hypotheses. Under the “opacity” hypothesis, corporate hedging makes earnings less informative, renders the firm opaque, and increases informed traders’ profitability. Under the “transparency” hypothesis, hedging reduces uncertainty and erodes the informed traders’ information advantage and profitability. Our tests support the transparency hypothesis. Hedging is associated with lower uncertainty (lower implied volatility and analyst forecast dispersion, and greater breadth of ownership). It is also associated with a lower informed trading intensity, in particular for short selling. Short selling profits are more than twice lower on the stocks of firms engaging in corporate hedging. The online appendix is available at https://doi.org/10.1287/mnsc.2016.2717 . This paper was accepted by Neng Wang, finance.