This paper aims to examine the indirect impact of geopolitical risk on the Vietnamese stock market and stock bubbles (VSB) through its impact on macro factors and commodity prices. Firstly, before testing the influence of geopolitical risk on stock bubbles, a stock bubble existence test using SADF (sup augmented Dickey-Fuller test) and GSADF (generalized sup Augmented Dickey-Fuller) is done.

Cointegration and error correction Professor Roy Batchelor City University Business School, London & ESCP, Paris EVIEWS r On the City University system, EVIEWS 3.1 is in Start/ Programs/ Departmental Software/CUBS r Analysing stationarity in a single variable using VIEW r Analysing cointegration among a group of variables r Estimating an ECM model r Estimating a VAR-ECM model