This study expands on previous research regarding the effect of CEO performance on firm value. An event study is conducted using a market model of CEO successions and daily returns in order to generate predicted returns. Two separate regressions are run using a 3 day and 5 day event window respectively. The results of the regressions are using to compare abnormal returns between industries and market capitalization. While some daily abnormal returns are statistically significant, cross-sectional analysis of CAR are for the most part not significant. Further study is needed in order to come to a stronger conclusion.