The choice of admissible trading strategies in mathematical modelling of financial markets is a delicate issue, going back to Harrison and Kreps (1979). In the context of optimal portfolio selection with expected utility preferences this question has been a focus of considerable attention over...

We study dynamic optimal portfolio allocation for monotone mean-variance preferences in a general semimartingale model. Armed with new results in this area we revisit the work of Cui, Li, Wang and Zhu (2012, MAFI) and fully characterize the circumstances under which one can set aside a...

This study examines whether the Asia – Pacific Foreign Exchange Market was in a weak form of efficiency against USD, during the period from 02/01/2010 to 31/12/2019. This study employed various linear measures, to examine the martingale behaviour of Asia – Pacific Foreign Exchange Market....