In this paper we construct the minimal entropy martingale for semi-Markov regime switching interest rate models using some general entropy measures. We prove that, for the one-period model, the minimal entropy martingale for semi-Markov processes in the case of the Tsallis and Kaniadakis...

The aim of the international conference ESPERA 2016 was to present and evaluate the economic scientific research portfolio, to argue and substantiate Romanian development strategies – including European and global best practices. The plenary session and the parallel sections were centered on...

The volatility analysis of stock returns data is paramount in financial studies. We investigate the dynamics of volatility and randomness of the Pakistan Stock Exchange (PSX-100) and obtain insights into the behavior of investors during and before the coronavirus disease (COVID-19 pandemic). The...

In this paper we make a comparison between two composite models: lognormal-Pareto and Weibull-Pareto. The first one was introduced by Cooray and Ananda in 2005. The second composite distribution was constructed in the same manner as lognormal-Pareto. Here, we prove that these models behave...

Multicriteria portfolio optimization started with the Markowitz mean-variance model (Markowitz 1952, 1959). This model assumes that the goal of an average or standard investor is to maximize the unknown return on investment. In this paper we propose a risk model related to insurance industry....