A Crude Oil Spot Price Forecasting Method Incorporating Quadratic Decomposition and Residual Forecasting

Table 4

Random forest feature importance values.

Indicator ranking	Variable	Correlation factor-Brent	Variable	Correlation factor-WTI
1	X8	0.779	X8	0.739
2	X5	0.118	X5	0.154
3	X7	0.026	X7	0.039
4	X1	0.025	X1	0.017
5	X6	0.015	X9	0.016
6	X9	0.011	X6	0.013
7	X4	0.01	X3	0.008
8	X2	0.009	X2	0.007
9	X3	0.007	X4	0.007

Bold values represent factors with random forest correlation coefficients greater than 0.01, which are treated as external influences on crude oil prices.