[1] Univ Padua, Dipartimento Matemat, Padua, Italy
[2] Leonard Vinci Pole Univ, Finance Lab, Paris La Def, France & Quanta Finanza Srl, Venice, Italy
[3] Univ Alcala de Henares, BBVA, Calle Sauceda 28, Madrid 28050, Spain
[4] Univ Alcala de Henares, Dept Management Sci, Calle Sauceda 28, Madrid 28050, Spain