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Quantitative Finance > Computational Finance

Title: Modelling stock correlations with expected returns from investors

Abstract: Stock correlations is crucial to asset pricing, investor decision-making, and financial risk regulations. However, microscopic explanation based on agent-based modeling is still lacking. We here propose a model derived from minority game for modeling stock correlations, in which an agent's expected return for one stock is influenced by the historical return of the other stock. Each agent makes a decision based on his expected return with reference to information dissemination and the historical return of the stock. We find that the returns of the stocks are positively (negatively) correlated when agents' expected returns for one stock are positively (negatively) correlated with the historical return of the other. We provide both numerical simulations and analytical studies and give explanations to stock correlations for cases with agents having either homogeneous or heterogeneous expected returns. The result still holds when other factors such as holding decisions and external events are included which broadens the practicability of the model.
Subjects: Computational Finance (q-fin.CP); Statistical Finance (q-fin.ST)
Cite as: arXiv:1803.02019 [q-fin.CP]
  (or arXiv:1803.02019v1 [q-fin.CP] for this version)

Submission history

From: Fei Ren [view email]
[v1] Tue, 6 Mar 2018 04:56:00 GMT (1497kb)