This paper analyzes and compares range-based and return-based variance/covariance estimates. We provide new results on the relative efficiency of the range. We show that the use of the range is compatible with time varying volatilities and we extend the range to a multivariate setup. A new...

The estimation and the analysis of long memory parameters have mainly focused on the analysis of long-range dependence in stock return volatility using traditional time and spectral domain estimators of long memory. The definitive ubiquity and existence of long memory in the volatility of stock...

Operational hedging techniques such as risk sharing, currency collars, and a hybrid arrangement can be used when transactions are subject to unexpected changes in the nominal exchange rate. These hedging devices utilise a risk sharing parameter and the market exchange rate of a currency pair....

The ınvestment decisions of institutional and individual investors in financial markets are largely influenced by market uncertainty and volatility of the investment instruments. Thus, the prediction of the uncertainty and volatilities of the prices and returns of the investment instruments...

The study investigates long-run relationships between futures and spot prices of cocoa on the New York CSCE and London Fox, respectively, and between both markets. By means of the Johansen Maximum Likelihood approach and the inclusion of interest rates as conditioning variables, the three...

Equity basket correlation is an important risk factor. It characterizes the strength of linear dependence between assets and thus measures the degree of portfolio diversification. It can be estimated both under the physical measure from return series, and under the risk neutral measure from...

In this study, we model realized volatility constructed from intraday high-frequency data. We explore the possibility of confusing long memory and structural breaks in the realized volatility of the following spot exchange rates: EUR/USD, EUR/JPY, EUR/CHF, EUR/GBP, and EUR/AUD. The results show...

Fractionally integrated autoregressive moving average (ARFIMA) and Heterogeneou Autoregressive (HAR) models are estimated and their ability to predict the one-trading-day-ahead CAC40 realized volatility is investigated. In particular, this paper follows three steps: (i) The optimal sampling...

The models for testing and dating breaks in stock returns and volatilities often rely on the restrictive assumption of common breaks. This assumption suggests that a shift occurred due to common innovations. Models under this assumption can only be estimated simultaneously. This assumption may...