Implied volatility linkages between the U.S. and emerging equity markets: A note

This paper investigates stock market integration among the U.S. and two leading emerging markets-China and Brazil-using their implied volatility indexes published by the Chicago Board of Options Exchange (CBOE). Employing ARDL bound tests, we find strong evidence of long-run transmission of uncertainty from the U.S. market to other markets. Additionally, results from a bivariate VAR-GARCH model indicate high correlations among the equity markets, which may diminish the gains from portfolio diversification between the U.S. market and the emerging markets under study. Finally, the Toda-Yamamoto version of the Granger causality test also suggests significant links among the volatility indexes under study.