Evidence shows that the economic assumption of efficient “free markets”—which underpins the “market versus state” debate—is questionable. Market efficiency is a significant foundation theory for neoliberal economists. Prove it wrong, and the neoliberals’ philosophy of market based...

We study the speed of convergence to market efficiency by examining the short-term return predictability using the high-frequency data of Chinese stocks. The empirical results reveal that it takes more than 30 minutes but less than 60 minutes for these stocks to accommodate the price pressures...

Using Bloomberg’s daily Twitter Sentiment data for S&P500 firms, we show that Twitter information reduces forecast optimism and improves forecast accuracy of sell-side equity analysts. Negative Twitter information is more influential, and this effect is distinct from the impact of news. Using...

The paper analyses the impact of futures contracts on weak form of Efficient Market Hypothesis on the Pakistan Stock Exchange (PSX). The current study uses ten years data of 18 companies, which offer futures contact, and 58 firms which do not offer futures contracts over the period from January...

We use an extended sample of tweets relating to energy markets in order to examine and quantify the existence of market efficiency. The tweets are used as a proxy for publicly available information and we examine the degree to which this information determines market movements on the next...

The recent emergence of COVID-19 and the subsequent short-selling restriction (SSR) imposed on some equity markets provide us with a unique framework to analyze the effects of this kind of measure on market quality in the context of increasingly automated equity markets. We contribute to the...

The closing call auction is an important feature of modern markets that improves the efficiency of closing prices as a benchmark. We examine the effects of COVID-19 on closing price dislocation – with a specific focus on the role of high-frequency and retail traders on closing price...