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T This study aims to identify and analyze the impact of COVID-19 and the implementation of PPKM level-4 on abnormal returns and stock trading on the LQ-45 with 3 time periods, namely 5, 30 and 60 days before after the announcement. The analytical technique used is a different test independent samples. The results of this study are based on 3 time window periods showing the announcement of covid-19 does not show any difference in abnormal returns. The existence of PPKM level-4 indicates an influence on abnormal returns for all windows. The announcement of the presence of covid has an effect for a period of 30 and 60 days, but for 5 days, it does not affect trading volume activity. PPKM level-4 has no impact on trading volume activity for 30 days but does affect 5 and 60 days. Announcement of the existence of covid-19 without tightening activities does not affect abnormal returns and trading volume, but the fact of activity restrictions through PPKM level-4 affects abnormal returns, Penelitian ini bertujuan untuk mengetahui dan menganalisi dampak adanya covid-19 dan pemberlakuan PPKM level 4 terhadap abnormal return dan volume perdagangan saham pada Indeks LQ45 dengan 3 periode waktu yaitu 5, 30 dan 60 hari sebelum dan sesudah pengumuman peristiwa. Teknik analisis yang digunakan adalah uji beda 2 sampel independen. Hasil dari penelitian ini adalah berdasarkan dengan dengan 3 periode jendela waktu menunjukkan adanya pengumuman covid-19 tidak menunjukkan adanya perbedaan abnormal return. Adanya PPKM level 4 menunjukkan adanya pengaruh terhadap abnormal return untuk semua jendala. Pengumuman adanya covid memberi pengaruh untuk periode waktu 30 dan 60 hari namum untuk periode 5 hari tidak memberikan pengaruh terhadap trading volume activity. PPKM level 4 tidak memberikan pengaruh terhadap trading volume activity untuk periode waktu 30, namum memberikan pengaruh untuk periode waktu 5 dan 60 hari. Penelitian memberikan kontribusi kebaruan dari sudut pengumumam PPKM level 4

This study aims to determine the effect of inflation, US dollar exchange rates, interest rates, and world oil prices on fluctuations in gold prices in Indonesia in 2014 - 2019. This research is a type of explanatory research with a quantitative approach. The data used are monthly time series data for 2014 - 2019 with a sample of 72 samples. The multiple linear regression model is used as an analysis technique in this study. The results of this study indicate that simultaneously (F test) inflation, USD exchange rates, interest rates, and world oil prices have a significant effect on gold price fluctuations in Indonesia. Partially (t-test) shows that the USD exchange rate has a significant positive effect on gold price fluctuations in Indonesia. Inflation and interest rates have a negative and insignificant effect on fluctuations in gold prices in Indonesia. Meanwhile, world oil prices have a positive and insignificant effect on gold price fluctuations in Indonesia.