Chinese Stock Index Futures Price Fluctuation Analysis and Prediction Based on Complementary Ensemble Empirical Mode Decomposition

Table 2

Correlations and variance ratios of IMFs and the residue term with the Chinese stock index futures price series.

	Mean value	Pearson correlation coefficient	Variance ratio (original series)
IMF1	0.131 (0.238)	0.041 (1.363)	0.273%
IMF2	−0.096 (−0.151)	0.066 (2.218)	0.372%
IMF3	−0.431 (−0.523)	0.097 (3.273)	0.614%
IMF4	−2.103 (−1.277)	0.163 (5.530)	2.446%
IMF5	−4.652 (−2.413)	0.218 (7.454)	3.354%
IMF6	46.989 (8.007)	0.660 (29.329)	31.076%
IMF7	−64.873 (−18.973)	−0.264 (−9.151)	10.550%
Res	2,625.727	0.762 (39.214)	70.278%

Note. The values in parentheses are the statistics, “∗ ∗” represents significance at the 5% level, and “” represents significance at the 1% level.