For the two stage stochastic programming model
For the cardinality constrained mean variance model, a combinatorial algorithm which hybridises a PSO and the mathematical programming method is proposed to address the problem. For the two stage stochastic programming model steriods, a hybrid algorithm which integrates a GA and a LP solver is presented to address the problem and a hybrid combinatorial approach which integrates a PBIL based metaheuristic and a LP solver is developed to address the problem with a large number of scenarios. One main advantage of the hybridisation approach is that it can guarantee the optimal weight allocation of the identified asset combinations.Some useful strategies for different metaheuristics are investigated in order to keep a balance between algorithms’ exploration and exploitation.
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