GSTARIMA Model with Missing Value for Forecasting Gold Price

Fadhlul Mubarak (Department of Statistics, EskiÅŸehir Technical University, EskiÅŸehir, Turkey)
Atilla Aslanargun (Department of Statistics, EskiÅŸehir Technical University, EskiÅŸehir, Turkey)
İlyas Sıklar (Department of Economics, Anadolu University, Eskişehir, Turkey)

Indonesian Journal of Statistics and Its Applications
Vol 6 No 1 (2022)

Gold is one of the investments that be a great demand. Selecting and applying the best GSTARIMA model for gold price forecasting was the aim of this study. However, the gold price data that has been obtained missing values. Missing value data has been imputed by the last data before the missing value and moving average techniques. The GSTAR (1) and GSTARI (1, 1) models have been combined with an imputation technique solved this problem. Based on the smallest RMSE value, the GSTARI (1, 1) model which has been combined with the imputation technique that used the last value was the best method because it produced the smallest RMSE when compared to other methods. Forecasting results shown that gold prices in the United States, United Kingdom, and Indonesia increased but gold prices in Turkey actually decreased. Forecasting gold prices in each of these countries become one of the references in investing in gold. Based on the results of gold price forecasting, gold prices changed but not significantly.