Sustainability discourse is becoming ubiquitous. Still, a significant gap persists between corporate sustainability talk and practice. Prior research on corporate sustainability reporting has relied primarily on two competing theoretical framings, signaling theory and legitimacy theory, which...

Purpose – This paper aims to study the informational dynamics that take place between a firm and its stakeholders with respect to corporate environmental management. Design/methodology/approach – The analysis is based on a case study contrasting environmental information reported by the case...

The sum of squared intraday returns provides an unbiased and almost error-free measure of ex-post volatility. In this paper we develop a nonlinear Autoregressive Fractionally Integrated Moving Average (ARFIMA) model for realized volatility, which accommodates level shifts, day-of-the-week...

This paper investigates the merits of high-frequency intraday data when forming minimum variance portfolios and minimum tracking error portfolios with daily rebalancing from the individual constituents of the S&P 100 index. We focus on the issue of determining the optimal sampling frequency,...

Quadratic optimization for asset portfolios often leads to error maximization, with optimizers zooming in on large errors in the predicted inputs, that is, expected returns and risks. The consequence in most cases is a poor real-time performance. In this paper we show how to improve real-time...