| Precision index | ARIMA (3,1,1) | ARIMA (4,1,1) | ARIMA (4,1,2) | ARIMA (4,1,8) |
| AIC | −6.384 | −6.385 | −6.382 | −6.375 |
| SC | −6.349 | −6.343 | −6.333 | −6.285 |
| HQ | −6.370 | −6.368 | −6.363 | −6.340 |
| F-statistics | 62.787 | 50.921 | 42.410 | 21.887 |
| Prob (F-statistics) | 0.000 | 0.000 | 0.000 | 0.000 |