Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices

Abstract
This study compared the performance of SARIMA and Prophet models in forecasting daily close prices of three major Indonesian banking stocks: BBCA, BBRI, and BMRI, using data from January 2020 to March 2026. Data were retrieved via the yfinance library, preprocessed, and split into 80% training and 20% testing sets. SARIMA modeling followed the Box-Jenkins procedure, while Prophet was configured with a Lag-1 regressor, weekly and monthly seasonality, Indonesian public holidays, and log transformation. Model performance was evaluated using MAPE, MSE, and Dstat metrics. Results showed that SARIMA outperformed Prophet in MAPE and MSE across all six stock-variable combinations, with MAPE values ranging from 1.3368% to 1.9386% for SARIMA and 1.5992% to 2.2300% for Prophet. However, Prophet demonstrated marginally higher Dstat values in several series. Both models achieved "Very Good" forecasting accuracy. A web-based forecasting system was also developed using Streamlit to make the models accessible to investors.
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How to Cite

Abdullah, et al. (2026). Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices. JURNAL ILMIAH KOMPUTER GRAFIS, 19(1). https://doi.org/10.51903/pixel.v19i1.3959

Abdullah, Syarifudin; Ida Bagus Nyoman Pascima; I Nyoman Tri Anindia Putra, "Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices," JURNAL ILMIAH KOMPUTER GRAFIS, vol. 19, no. 1, 2026.

Abdullah, Syarifudin; Ida Bagus Nyoman Pascima; I Nyoman Tri Anindia Putra. "Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices." JURNAL ILMIAH KOMPUTER GRAFIS, vol. 19, no. 1, 2026.

Abdullah, Syarifudin; Ida Bagus Nyoman Pascima; I Nyoman Tri Anindia Putra. "Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices." JURNAL ILMIAH KOMPUTER GRAFIS 19, no. 1 (2026).

Abdullah, et al. (2026) 'Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices', JURNAL ILMIAH KOMPUTER GRAFIS, 19(1). doi: 10.51903/pixel.v19i1.3959.

Abdullah, Syarifudin; Ida Bagus Nyoman Pascima; I Nyoman Tri Anindia Putra. Performance Comparison of SARIMA and Prophet Models for Forecasting Indonesian Banking Stock Prices. JURNAL ILMIAH KOMPUTER GRAFIS. 2026;19(1).

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