abstract portfolio definition is the most important decision for individuals and legal persons that invest in stock. the main objective of this paper is study and determination of optimal portfolio for stock of active food industrial company in tehran stock based on value at risk (var) index. for this purpose, we used weekly static of stock of active food industrial company in tehran from bahma...

This paper tests whether information advantages help explain why some individual investors concentrate their stock portfolios in a few stocks. Slock investments made by households that choose lo concentrate their brokerage accounts in a few stocks outperform those made by households with more diversified accounts (especially among those with large portfolios). Excess returns of concentrated rel...

This study analyzes the accuracy of forecasted target prices which are disclosed by leading investment banks within their analysts’ reports on German stocks for the period from 2002 to 2004. We compute a measure for target price forecast accuracy that evaluates the ability of analysts to exactly forecast the ex-ante (unknown) 12-months stock price. Overall, the target price forecasting accuracy...

This paper presents a comprehensive analysis of the preand post-privatization operating performance and stock market performance of privatized banks and rival banks in middleand low-income countries. First, we find that privatization announcements elicit negative abnormal returns for rival banks and that the effects are more pronounced for subsequent tranche sale where the proportion of governm...

Weights in the Toronto Stock Exchange 300 index are determined by the market values of the included stocks’ public floats. In November 1996, the exchange implemented a previously announced revision of its definition of the public float. This revision, which increased the floats and the index weights of 31 stocks, conveyed no information and had no effect on the legal duties of shareholders. Aff...

Random Matrix Theory (RMT) and the decomposition of correlation matrix method are employed to analyze spatial structure of stocks interactions and collective behavior in the Shanghai and Shenzhen stock markets in China. The result shows that there exists prominent sector structures, with subsectors including the Real Estate (RE), Commercial Banks (CB), Pharmaceuticals (PH), Distillers&Vintners ...

The aim of this research is to explore the relationship of corporate governance with firm risk. This study establishes a link between corporate governance variables and firm risk for a sample of 106 Pakistani firms over a time of six years (20052010). Based on the estimation results, family control and bank control have negative impact on the firm risk whereas ownership structure and chairman/C...