基于遗传算法的投资组合模型及实证研究(3)

2020-12-29 23:57

基于遗传算法的投资组合模型及实证研究

Abstract

Portfoliobasedonuncertainenvironment,anyincomewillbeaccompaniedby

certainrisks,inordertospreadagreatriskandgetamorcstableinvestmentincome,canbeinavarietyofsecuritiesindifferentproportiontocarryoutinvestment,thekeyofportfolioisbasedonthepreferencesofinvestors,makeabanlancebetweenincomeandrisk,identifyavarietyofsecuritiesintheportfolioofproportion,SOcangetasatisfiedportfolio.

Thegeneticalgorithmisakindofsearchingmethodwhichsimulatesthenatural

evolution.Itssimpleandeasytoimplement,especiallyitdoesn’tneedthespecialfieldknowledge,butsimpleusesfitnessfunctionasanassessmenttoinstructthesearchprocess,SOithasbeenusedinverybroadfields.Nowthegeneticalgorithmhasgotalotoffruitsandscholarsbegintopayattentiontoit.Thispapergivesabriefintroductiontothebasicconceptionandtheoriesofthegeneticalgorithm.Anditalsoprovidesadetailedexplanationonthecomponentsofthegeneticalgorithm,withtheemphasisonthestrategiesofselection,crossover,mutationandthebasictheorem--schematheorem.

Thispapercombinesportfolioandgeneticalgorithm,andbringupaportfolio

basedongeneticalgorithm.Throughstudyofsomeportfoliomodel,consideringthepractrcalityofmoderportfolioselectiontheory,weproposeaconstrainedportfolioselectionmodelbasedonthenoshortsale,transactioncostsandminimunlotconstraints.Duetothesecomplexconstrainsourproposedproblembecomesamixedintegeroptimizationproblemandtraditionalalgorithmcan’tsolveitefficiently.Thus,allimprovedgeneticalgorithmisdesignedtosolveourproposedproblem.

Atlast,fromChina’Ssecuritiesmarketasevidence,Canbeseetheportfolioand

algorithmthatweproposedisfeasibilityandvalidity.

Keywords:portfolioinvestment,geneticalgorithm,investmentconstrain


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