The study aims at measuring impact of Indian government commitment on ESG100 index and BSE Manufacturing Index of Bombay Stock Exchange. The study uses the Event sturdy approach to compare pre-event and post-event Abnormal return and cumulative abnormal return. The Bootstrapping and Wilcoxon tests has been used for comparison. There is no significant difference found in abnormal return of both of the index. Mean adjusted cumulative abnormal return of both of the index es has significant differences. In BSE ESG100 index, Market adjusted cumulative abnormal return has no significant difference. In BSE Manufacturing index, Mean adjusted cumulative abnormal return has significant difference. The carbon neutrality deadline is long away, so Indian investors do not consider CoP26 seriously.