Matthew J. Clayton

The Impact of CEO Turnover on Equity Volatility

A change in executive leadership is a significant event in the life of a firm. This study investigates an important consequence of a CEO turnover: a change in equity volatility. We develop three hypotheses about how changes in CEO might affect stock price volatility, and test these hypotheses using a sample of 872 CEO turnovers over the 1979-1995 period. We find that volatility increases following a CEO turnover, even when the CEO leaves voluntarily and is replaced by someone from inside the firm. Forced turnovers increase volatility more than voluntary turnovers - a finding consistent with the view that forced departures imply a higher probability of large strategy changes. For voluntary departures, outside successions increase volatility more than inside successions. We attribute this volatility change to increased uncertainty over the successor CEOs skill in managing the firms operations. We also document a greater stock price response to earnings announcements following CEO turnover, consistent with more informative signals of value driving the increased volatility. Our findings are robust to controls for firm-specific characteristics such as firm size, changes in firm operations, and changes in volatility and performance prior to the turnover.

On the Formation and Structure of International Exchanges

We investigate the formation and structure of 248 financial exchanges throughout the world. First, we empirically analyze the determinants of exchange formation as well as the impact of exchange formation on the domestic countrys economy. Second, conditional on formation, we use a probit model to relate the choice of trading mechanism to the characteristics of the economic environment in which the exchange exists. We find that the main determinants of exchange formation in a country are the degree of economic freedom, the growth of the economy, the availability of technology, and the legal system. In addition, we find that the impact of exchange formation on the macro economy is limited to a reduction in the growth of the monetary aggregates with no significant impact on productivity. Lastly, our results show that the choice of trading mechanism depends on the countrys economic development, the degree of competition, and the extent of economic freedom.