An application of ADCC-GARCH and wavelet coherence to explore connectedness between stock markets and cryptocurrencies

Abstract

The current study aims to explore the dynamic connectedness between stock and cryptocurrency markets and to determine the role of cryptocurrencies in the stock market as a hedge, diversifier, or safe haven. The study uses daily data of four stock indices and six cryptocurrencies, covering a period of January 2016 to December 2022. The analysis is conducted using the ADCC-GARC method with the wavelet coherency. The results indicate both stock and cryptocurrency markets exhibit long-run volatility persistence. The properties of Bitcoin, Ethereum, Binance Coin, Dogecoin, and Ripple vary between a range of hedges and diversifiers in different stock markets, which can change depending on market circumstances. However, only Tether has shown that it can act as a safe haven investment in all studied stock markets over time.