The efficient-market hypothesis (EMH) is one of the most important economic and financial hypotheses that have been tested over the past century. Due to many abnormal phenomena and conflicting evidence, otherwise known as anomalies against EMH, some academics have questioned whether EMH is...

This paper examines the weak-form efficient markets hypothesis for the Nigerian stock market by testing for random walks in the monthly index returns over the period 1984-2009. The results of the non-parametric runs test show that index returns on the Nigerian Stock Exchange (NSE) display a...

We investigate the impact on firms of joining the S&P 500 index from 1997 to 2017. We find that the positive announcement effect on the stock price of index inclusion has disappeared and the long-run impact of index inclusion has become negative. Inclusion worsens stock price informativeness and...

The efficient market research to date has focused mostly on the developed stock markets. To be efficient the market needs to be large and liquid, transaction costs should be cheaper than the expected investment strategy profits and Macedonian capital market as a developing market is...

Existing literature documents that cross-sectional stock returns exhibit both price momentum and earnings momentum. In this paper, we examine whether commonly used style and sector indexes also have momentum patterns. We show that style indexes exhibit strong price momentum, but little evidence...

Can a short-squeeze incident trigger financial contagion over the entire stock markets? The recent GameStop frenzy provides a unique natural experiment to explore this question. In this study, we examine the static and dynamic return and volatility connectedness among the GameStop stock, the...

Building on prior literature which suggests that investors in most countries, but not Japan, are subject to behavioural biases that cause momentum, and informed by the shared cultural values in Japan which leans heavily in favour of collective action, this paper asks whether stock return...

This paper presents evidence suggestive of a conditional violation of weak-form market efficiency. Evidence suggests that the AR coefficient monotonically decreases along the return distribution, for each value and equal weighted market indices. These results suggest that the AR coefficient is...