t-Statistic

Prob.*

工商银行

ADF test statistic

−26.5781

0.0000

Test critical values:

1% level

−3.4383

5% level

−2.8649

10% level

−2.5686

建设银行

ADF test statistic

−26.7279

0.0000

Test critical values:

1% level

−3.4382

5% level

−2.8649

10% level

−2.5786

中国银行

ADF test statistic

−15.5183

0.0000

Test critical values:

1% level

−3.4379

5% level

−2.8651

10% level

−2.5678