Few studies have examined the impact of portfolio concentration upon the realised volatility of stock index portfolios, such as the FTSE 100. Instead, previous research has focused upon diversification across industries, across geographic regions and across different firms. The present study...

Firms changing their listing from the less regulated AIM to the more regulated main section of the London Stock Exchange exhibit positive returns on the day the decision is announced, while for firms moving in the opposite direction both announcement and implementation day returns are negative....

We investigate the separate and joint influences of social engagement measures on stock market participation and find that socially engaged individuals are more likely to participate. Consistent with Granovetter's (1973) theory of social networks we find that a weak tie (measured by social group...