Bank ownership and stock price informativeness. Does politics matter?

This study investigates the effects of ownership on the informativeness of the stock prices of 636 commercial banks from 59 countries for 2002–2014. We find strong and robust evidence that state ownership is associated with stock prices having less information in developing countries. This result is consistent with the conjecture that state ownership is associated with a less transparent environment that discourages investors from trading on private information. Furthermore, we find that politics magnifies the effect of state ownership on the informativeness of stock prices during election years. In particular, we show that stock prices are less informative for state ownership in countries with civil law or parliamentary systems. These findings shows that the political channel plays an important role in determining the expropriation by government shareholders, especially in developing countries.