Series i) no terms ii) with intercept iii) with a time trend
Korea SE Kospi Index 1.01 (0.97, 1.05) 1.00 (0.96, 1.05) 1.03 (1.00, 1.06)
Nikkei 225 Index 0.99 (0.95, 1.04) 0.95 (0.92, 0.99) 0.87 (0.85, 0.90)
Shanghai Shenzhen CSI 300 Index 1.01 (0.98, 1.05) 1.03 (1.00, 1.08) 1.03 (1.00, 1.08)