This study investigates how exchange-traded fund (ETF) activity affects the informational efficiency of its underlying stocks in the Chinese market which has several different features from developed markets. We show that increased ETF ownership improves stock liquidity and attracts informed...

We examine the price disorder and market efficiency of five cryptocurrencies (Bitcoin, BNB, Cardano, Ethereum, and XRP) before and during COVID-19 pandemic period. Using permutation entropy and Fisher information measure (FIM), we construct the Shannon-Fisher causality plane (SFCP) to map these...

This paper aims to discuss market efficiency due to the changes that appeared in this field after the COVID-19 outburst. The OMX exchange and its indices are taken into consideration because they represent markets not analysed in such a context before (a) Baltic: Estonia, Latvia and Lithuania;...

This study assesses the link between market efficiency proxies and the capacity of stock prices to anticipate a firm's future economic performance. The analysis, which covers firms from 31 countries in the period 1990.-2019, reveals a strong association between the average score of market...