Journals / Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi / 2018 / Cilt: 24 - Sayı: 1

Particle swarm optimization algorithm for mean-variance portfolio optimization: A case study of Istanbul Stock Exchange

Ortalama-Varyans portföy optimizasyonu için parçacık sürü optimizasyonu algoritması: Bir Borsa İstanbul uygulaması

Pages
124–129
Publication Date
2018-02-27
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The experiments show that while in low risk levels it is required to invest into more number of assets in order to converge unconstrained efficient frontier, as risk level increases the number of assets to be held is decreased.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:While investors used to create their portfolios according to traditional portfolio theory in the past, today modern portfolio approach is widely preferred.
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Key Findings & Data:A greater number of securities in a portfolio is difficult to manage and has an increased transaction cost.
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Conclusion & Impact:The experiments show that while in low risk levels it is required to invest into more number of assets in order to converge unconstrained efficient frontier, as risk level increases the number of assets to be held is decreased.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Portföy optimizasyonu · Ortalama-varyans modeli · Sezgisel metotlar

Abstract

While investors used to create their portfolios according to traditional portfolio theory in the past, today modern portfolio approach is widely preferred. The basis of the modern portfolio theory was suggested by Harry Markowitz with the mean variance model. A greater number of securities in a portfolio is difficult to manage and has an increased transaction cost. Therefore, the number of securities in the portfolio should be restricted. The problem of portfolio optimization with cardinality constraints is NP-Hard. Meta-heuristic methods are generally preferred to solve since problems in this class are difficult to be solved with exact solution algorithms within acceptable times. In this study, a particle swarm optimization algorithm has been adapted to solve the portfolio optimization problem and applied to Istanbul Stock Exchange. The experiments show that while in low risk levels it is required to invest into more number of assets in order to converge unconstrained efficient frontier, as risk level increases the number of assets to be held is decreased.

Özet

Geçmişte, yatırımcılar portföylerini geleneksel portföy teorisi yaklaşımına göre oluştururken, günümüzde, modern portföy teorisi yaklaşımı daha yaygın tercih edilmektedir. Modern portföy teorisinin temelleri, Harry Markowitz tarafından geliştirilen ortalama varyans modeli ile atılmıştır. Fazla sayıda menkul kıymetten oluşan bir portföyün işlem maliyeti artacak ve kontrolü zorlaşacaktır. Bu nedenle, ortalama-varyans modeline portföydeki menkul kıymet sayısı kısıtı eklenmelidir. Eleman sayısı kısıtlı portföy optimizasyonu problemi NP-Zor sınıfındadır. Bu sınıftaki problemlerin, kesin çözüm üreten algoritmalar ile kabul edilebilir zaman diliminde çözümü zor olduğundan sezgisel yöntemlere genellikle başvurulmaktadır. Bu çalışmada, portföy optimizasyonu problemi çözümü için bir parçacık sürü optimizasyonu algoritması uyarlanarak ve Borsa İstanbul endeksine uygulanmıştır. Elde edilen deneysel bulgular göstermektedir ki, kısıtsız etkin sınıra yaklaşabilmek için düşük risk seviyelerinde daha fazla hisseye yatırım yapılması gerekirken, risk seviyesi arttıkça elde tutulması gereken hisse senedi sayısı azalmaktadır.

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Cite This Article

AKYER, H., KALAYCI, C. B., AYGÖREN, H. (2018). Particle swarm optimization algorithm for mean-variance portfolio optimization: A case study of Istanbul Stock Exchange. Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 24 - Sayı: 1, 124–129. https://ajindex.com/articles/42412

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