ANALISIS JANUARY EFFECT PADA PERUSAHAAN TERDAFTAR DI INDEKS KOMPAS100 SEBELUM, SELAMA, DAN SESUDAH PANDEMI COVID-19

This study aims to determine the existence of calendar anomalies (January Effect) in the period before, during and after the COVID-19 pandemic in companies listed in the KOMPAS100 index. The data used is secondary data. The population in this study is companies listed in the KOMPAS100 index on the Indonesia Stock Exchange. The sampling technique used was a purposive sampling technique and was obtained from 35 companies with a total of 210 samples (observation data). Hypothesis testing was carried out by the Paired t Test and the Wilcoxon Signed Rank Test. The results of this study showed that there was a January Effect in the period before the COVID-19 pandemic, no January Effect was found in the period during and after the COVID-19 pandemic.