Variables | ADF Test Statistics | Critical Values @ 5% | P-value | Order of Integration |

D(HDI) | −3.523961 | −2.976263 | 0.0150 | I(I) |

D(SMC) | −3.719519 | −2.971853 | 0.0093 | I(0) |

D(TR) | −4.010721 | −2.971853 | 0.0046 | I(0) |

D(VST) | −5.520205 | −2.976263 | 0.0001 | I(1) |