Untoro HA-Z, Sumarto AH. Analysis of the BISNIS-27 Index Movement Using the Autoregressive Integrated Moving Average (ARIMA) Method During and After the COVID-19 Pandemic. IJSAS [Internet]. 2026 Sep. 30 [cited 2026 Oct. 3];4(9):1217-28. Available from: https://ijsasjournal.my.id/index.php/ijsas/article/view/68