Precious metals (gold, silver, and platinum) have become an important part of investment portfolios for individuals as well as for institutions. A key question is whether investors should actively trade these metals to time the market or whether they should take a buy-and-hold strategy. This...

The aim of this paper is to examine the positive and negative impacts of stock exchange mergers on the informational efficiency of the markets. We consider a range of factors in relation to the stock exchange merger, that can potentially affects market efficiency, after a merger. These factors...

This study examines return predictability of major foreign exchange rates by testing for martingale difference hypothesis (MDH) using daily and weekly nominal exchange rates from 1975 to 2009. We use three alternative tests for the MDH, which include the wild bootstrap automatic variance ratio...

A Monte Carlo experiment is conducted to compare power properties of alternative tests for the martingale difference hypothesis. Overall, we find that the wild bootstrap automatic variance ratio test shows the highest power against linear dependence; while the generalized spectral test performs...

This study examines return predictability of major foreign exchange rates by testing for martingale difference hypothesis (MDH) using daily and weekly nominal exchange rates from 1975 to 2009. We use alternative MDH tests for linear and nonlinear dependence, which include wild bootstrap...

This paper analyzes the degree of return predictability (or weak-form informational efficiency) of Dow Jones Islamic and conventional size and sector-indices using the data from 1996 to 2013. Employing the automatic portmanteau and variance ratio tests for the martingale difference hypothesis of...