Application of ARIMA Modeling to forecast the WeeklyStock Price per Share of (Persero) PT Telekomunikasi Indonesia Tbk

Jocelyn Beatrice Mihardja

Abstract


This research is aimed to forecast the weekly stock price of PT Telkom using the ARIMA modeling approach. The dataset used in this study spanned from May 02, 2022 to January 30, 2023. The ARIMA(3,2,1) model was found to be the best fit for the data. The model's formula was Yt=-0.7692 Yt-1-7409 Yt-2-0.5175 Yt-3+et-0.2444 et-1, where Yt represents the stock price at time t and et represents the residual error at time t. This model was used to predict the stock price for the next 8 weeks. The accuracy of the chosen model is 85005.53, 0.0899, 353.67, and 8.99% respectively to MSE, RMSE, MAE, and MAPE. The forecasted results showed a gradual upward trend in the stock price with some fluctuations, indicating a positive outlook for PT Telkom in the coming weeks.


Keywords


ARIMA; Forecast; PT Telekomunikasi Indonesia Tbk.; Telecommunication; Stock Market

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References


A. Hayes, "Stocks: What They Are, Main Types, How They Differ From Bonds," Investopedia, 2023. [Online]. Available: https://www.investopedia.com/terms/s/stock.asp. [Accessed 27 April 2024].

S. Bachtiar, "Penerapan Model Pembelajaran Problem Based Learning Untuk Meningkatkan Kemampuan Berpikir Kritis, Kesadaran Metakognitif dan Hasil Belajar Kognitif Biologi Pada Siswa Kelas XI di SMA Negeri 1 Binamu," Test Repository, 2013. [Online]. Available: http://eprints.unm.ac.id/2262/. [Accessed 27 April 2024].

M. K. Okasha and A. A. Yaseen, "Comparison between ARIMA Models and Artificial Neural Networks in Forecasting Al-Quds Indices of Palestine," ResearchGate, 2013. [Online]. Available: https://www.researchgate.net/publication/258221036. [Accessed 27 April 2024].

Telkom Indonesia, "About Telkomgroup," [Online]. Available: https://www.telkom.co.id/sites/about-telkom/en_US/page/profile-and-brief-history-24. [Accessed 27 April 2024].

D. Hatidja, "Penerapan Model ARIMA untuk Memprediksi Harga Saham PT. Telkom Tbk," Jurnal Ilmiah Sains, vol. 11, no. 1, pp. xx–xx, 2011.

D. A. Rezaldi and Sugiman, "Peramalan Metode ARIMA Data Saham PT. Telekomunikasi Indonesia," PRISMA, Prosiding Seminar Nasional Matematika, vol. 4, pp. 611–620, 2021.

A. Faisal, "Prediksi Saham Telkom dengan Metode ARIMA," Jurnal Bisnis, Logistik dan Supply Chain (BLOGCHAIN), vol. 1, no. 2, pp. 45–50, 2021.

Tableau, "Time Series Analysis: Definition, Types, Techniques," Tableau, [Online]. Available: https://www.tableau.com/learn/articles/time-series-analysis. [Accessed 27 April 2024].

T. Smith, "Autocorrelation: What It Is, How It Works, Tests," Investopedia, 2023. [Online]. Available: https://www.investopedia.com/terms/a/autocorrelation.asp. [Accessed 27 April 2024].

Cross Validated, "ACF and PACF of Residuals to Determine ARIMA Model," Stack Exchange, [Online]. Available: https://stats.stackexchange.com/questions/380966. [Accessed 27 April 2024].

J. J., "MAE and RMSE — Which Metric is Better?," Medium, 3 January 2021. [Online]. Available: https://medium.com/human-in-a-machine-world/mae-and-rmse-which-metric-is-better-e60ac3bde13d. [Accessed 27 April 2024].

J. Frost, "Mean Squared Error (MSE)," Statistics by Jim, 2021. [Online]. Available: https://statisticsbyjim.com/regression/mean-squared-error-mse/. [Accessed 27 April 2024].

V. Vipin, "Root Mean Square - RMSE," Infinity Learn, 27 December 2022. [Online]. Available: https://infinitylearn.com/surge/maths/root-mean-square/. [Accessed 27 April 2024].

Indeed Editorial Team, "What is MAPE? A Guide to Mean Absolute Percentage Error," Indeed Career Guide, 2023. [Online]. Available: https://www.indeed.com/career-advice/career-development/what-is-mape. [Accessed 27 April 2024].

Yahoo Finance, "TLKM.JK Historical Data," [Online]. Available: https://finance.yahoo.com/quote/TLKM.JK/history. [Accessed 27 April 2024].

M. Chaudhary, "Why is Augmented Dickey–Fuller Test (ADF Test) so Important in Time Series Analysis," Medium, 14 December 2021. [Online]. Available: https://medium.com/@cmukesh8688/why-is-augmented-dickey-fuller-test-adf-test-so-important-in-time-series-analysis-6fc97c6be2f0. [Accessed 27 April 2024].

C. D. Lewis, Industrial and Business Forecasting Methods: A Radical Guide to Exponential Smoothing and Curve Fitting. London: Butterworth Scientific, 1982.




DOI: http://dx.doi.org/10.33021/jafrm.v4i1.6246

DOI (PDF): http://dx.doi.org/10.33021/jafrm.v4i1.6246.g2328

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