In the present study we examine the impact of ex-dividend day on stock returns to Indian companies listed under Nifty 50 companies during the period 2011-2015 both inclusive. We examine the daily abnormal returns for 61 days, 31 days and 11 days event window using event study methodology with an estimation period of 250 days prior to ex-dividend date. Abnormal returns have been calculated using Market Model with Nifty index as proxy for market returns.To test the significant of Average Abnormal Returns both parametric and non-parametric tests has been used, that is paired t -test and Wilcoxon Signed Rank Test. We conclude from the analysis of the study that AAR have been statistically significant for 31 days event window, with an average mean of 0.0944 during preannouncement and -.0960 average mean during post announcement. This implies that, there had been very high actual returns during the preannouncement period indicating positive market reaction.

We examine the IPO firm's acquisition activity influence on the long-run performance of IPO during 1994IPO during -2015 We find that the IPO acquiring firms are generating positive abnormal returns for the first 2 years of going public and in the third, these firms generate negative abnormal returns, but they perform better than the non-acquiring IPO firms. We further investigate influence acquiring by introducing other factors which influence the performance of IPO, we find that the acquisition activity was not significant or weakly significant and beta values to be positive. We conclude that the investors are confident that the acquisition activity of IPO firms are value enhancing which otherwise believed.

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