[1] Univ Econ Bratislava, Inst Econ & Management, Bratislava, Slovakia
[2] Masaryk Univ, Inst Financial Complex Syst, Brno, Czech Republic
[3] Librade Ltd, London, England
[4] Ton Duc Thang Univ, Dept Management Sci & Technol Dev, Ho Chi Minh City, Vietnam
[5] Ton Duc Thang Univ, Fac Finance & Banking, Ho Chi Minh City, Vietnam
[6] Montpellier Business Sch, Montpellier, France