An Event Study Analysis on Semi - Strong Form Efficiency of Selected Auto Index Stocks Listed in National Stock Exchange

The purpose of this paper is to investigate the dynamic constituents that have an impact on the stock prices in assessing the capital market efficiency. The study focuses on selected auto index stocks to investigate the impact of specific events on stock prices and market efficiency by employing relevant statistical analyses. The methodology involves identifying key event such as Dividend announcement during the study period 2022- 2023 of five auto index companies. Through the examination of abnormal returns and cumulative abnormal returns surrounding these events, the study aims to assess the speed and efficiency with which capital markets incorporate new information. The study aims to contribute valuable insights into the responsiveness of capital markets to significant events within the automotive industry by shedding light on the efficiency and incorporation of the information by events on stock to become reactants through stock prices.