China's stock markets, with stringent short-sales constraints, dominance of inexperienced individual investors, a small asset float and heavy share turnover (500% per year despite a high transaction cost), provide a unique opportunity to study non-fundamental components in stock prices. In particular, several dozen Chinese firms o#ered two classes of shares: class A, which could only be held by domestic investors, and class B, which could only be traded by foreigners. Despite their identical...