Bank Indonesia strengthened its monetary operating framework by implementing a new policy rate, the BI-7 Day Reverse Repo Rate (BI7DRR). At the Board of Governors Meeting (RDG) of Bank Indonesia on November 16-17, 2022, decided to raise the BI7DRR by 50 bps (basis points) to 5.25% as a step in controlling the inflation rate and strengthening the stabilization policy towards the Rupiah exchange rate. This research is an event study that aims to empirically test the information content of the announcement of the increase in the Bank Indonesia 7-Day Reverse Repo Rate on November 17, 2022. The population in this study are all companies included in the list of companies in the Kompas 100 Index. Determination of the research sample size using the slovin technique so as to obtain 80 sample companies and sampling using the simple random sampling method. Tests were conducted on abnormal returns using the one-sample t-test analysis on 80 sample companies in the Kompas 100 Index. The results of the research on the announcement of the increase in the Bank Indonesia 7-Day Reverse Repo Rate on November 17, 2022 show that significant abnormal returns are only found at t-3 and t0, and are not significant at t-2, t-1, t+1, t+2, t+3, so it can be concluded that the policy has information content but is absorbed quickly by market participants, so the market is said to be efficient in the semistrong form information.
Keywords: Abnormal Return; Capital Market Reaction; Efficient Market Hypotesis; Interest Rate.