Asymptotic dynamics and value-at-risk of large diversified portfolios in a jump-diffusion market

Lim Kian Guan, Liu Xiaoqing and Tsui Kai Chong

Quantitative Finance, 2004, vol. 4, issue 2, 129-139

Abstract: This paper studies the modelling of large diversified portfolios in a financial market with jump-diffusion risks. The portfolios considered include three categories: equal money-weighted portfolios, risk-minimizing portfolios and market indices. Reduced-form dynamics driven jointly by one Brownian motion and one Poisson process are derived for the asymptotics of such portfolios. We prove that derivatives written on a portfolio can be priced by treating the asymptotic dynamics as the underlying process if the number of assets in the portfolio is sufficiently large. Analytical and Monte Carlo value-at-risk can be computed for the portfolios based on their asymptotic dynamics.

Date: 2004
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DOI: 10.1080/14697680400000017

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