We test for and model volatility jumps for three major indices of the Athens Stock Exchange (ASE). Using intraday data we first construct several, state-of-the-art realized volatility estimators. We use these estimators to construct the jump components of volatility and perform various tests on...

This paper examines the economic value of various realized volatility and covariance estimators under the strategy of volatility timing. There are used three types of portfolios: Global Minimum Variance, Capital Market Line kai Capital Market Line with only positive weights. The state-of-the-art...

In this paper I test for and model volatility jumps for the General Index (GD) of the Athens Stock Exchange (ASE), expanding the previous literature on the ASE in various ways. Using intraday data I first construct various state-of-the-art realized volatility estimators which I then use in...

In this paper I examine the properties of four realized correlation estimators and model their jumps. The correlations are between the three main FTSE indices of the Athens Stock Exchange (ASE). Using intraday data I rst construct four state-of-the-art realized correlation estimators which I...

In this paper I propose a novel optimal linear filter for smoothing, trend and signal extraction for time series with a unit root. The filter is based on the Singular Spectrum Analysis (SSA) methodology, takes the form of a particular moving average and is different from other linear filters...

In this paper I consider the problem of optimal linear filtering, smoothing and trend extraction for m-period differences of processes with a unit root. Such processes arise naturally in economics and finance, in the form of rates of change (price inflation, economic growth, financial returns)...

This paper, builds on the work of Hirshleifer, Hou, Teoh and Zhang (Journal of Accounting and Economics, 38, 2004) on the NOA (net operating assets) anomaly. After controlling for current profitability, we find a strong negative relation of NOA with future stock returns. Moreover, the results...

We investigate the behavior of consumer confidence around national elections in the EU-15 coun- tries during 1985:1-2007:3. Consumer con¯dence increases before the date of elections and falls subsequently by almost the same amount. It is able to predict the strength of the performance of the...

We build on extant theory of the MNC, MNC subsidiaries, absorptive capacity and Penrose’s concept of ‘productive opportunity’ to develop a framework on the MNC and absorptive capacity (AC) that allows us to explore the role of subsidiaries in the global sourcing of knowledge. We develop...

We examine the `relative optimality' of sign predictions for financial returns, extending the work of Christoffersen and Diebold (2006) on volatility dynamics and sign predictability. We show that there is a more general decomposition of financial returns than that implied by the sign...