Article history: Received 20 September 2013 Accepted 23 December 2014 Available online 27 December 2014 This paper examines whether firms with greater research and development (R&D) expenditures earn higher stock returns when they have good corporate governance. After controlling for size, book-to-market ratio, momentum, asset growth, accruals, and abnormal capital expenditures, we determine th...

This paper proposes an approach to the intraday analysis of diversified world stock accumulation indices. The growth optimal portfolio (GOP) is used as reference unit or benchmark in a continuous financial market model. Diversified portfolios, covering the world stock market, are constructed and shown to approximate the GOP, providing the basis for a range of financial applications. The normali...

Traditional risk-adjusted performance measures, such as the Sharpe ratio, the Treynor index or Jensen’s alpha, based on the mean-variance framework, are widely used to rank mutual funds. However, performance measures that consider risk by taking into account only losses, such as Value-at-Risk (VaR), would be more appropriate. Standard VaR assumes that returns are normally distributed, though th...

There is a growing literature on implied volatility indices in developed markets. However, no similar research has been conducted in the context of emerging markets. In this paper, an implied volatility index (GVIX) is constructed for the fast developing Greek derivatives market. Next, the properties of GVIX are explored. In line with earlier results, GVIX can be interpreted as a gauge of the i...

Both unconditional mixed-normal distributions and GARCH models with fat-tailed conditional distributions have been employed for modeling financial return data. We consider a mixed-normal distribution coupled with a GARCH-type structure which allows for conditional variance in each of the components as well as dynamic feedback between the components. Special cases and relationships with previous...

This paper provides a model for valuing stocks that takes into account the stochastic processes for earnings and interest rates. Our analysis differs from past research of this type in being applicable to stocks that have a positive probability of zero or negative earnings. By avoiding the singularity at the zero point, our earnings-based pricing model achieves improved pricing performance. The...

China has an A-share market that is open only to local investors and a B-share market that is open only to foreign investors. Contrary to what has been observed in other markets with a similar segmented structure, the China B shares trade at a discount relative to the A shares. We show that the phenomenon can still be explained by basic economic principles. Speci®cally, the existence of the H-s...

A very debated issue in recent years is the cyber crime and its impact on market returns and reputation of firms. The issue is made particularly actual by the proliferation of information technology and internet. Information security breaches are concerned with protecting the accessibility, integrity and confidentiality of information. As a consequence, there are potential high explicit and imp...

Eling and Schuhmacher (2007) compared the Sharpe ratio with other performance measures and found virtually identical rank ordering using hedge fund data. They conclude that the choice of performance measure has no critical influence on fund evaluation and that the Sharpe ratio is generally adequate for analyzing hedge funds. Nevertheless, their analysis does not include the class of tailor-made...

This study extends the dynamic conditional correlation model to allow day-specific correlations of shocks across international stock markets. The properties of the resulting periodic dynamic conditional correlation (PDCC) model are examined, with the model then applied to study the intra-week interactions between six developed European stock markets and the US over the period 1993 2005. We find...