Local risk-minimization with multiple assets under illiquidity with applications in energy markets

Panagiotis Christodoulou, Nils Detering and Thilo Meyer-Brandis

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Abstract: We propose a hedging approach for general contingent claims when liquidity is a concern and trading is subject to transaction cost. Multiple assets with different liquidity levels are available for hedging. Our risk criterion targets a tradeoff between minimizing the risk against fluctuations in the stock price and incurring low liquidity costs. Following \c{C}etin U., Jarrow R.A., and Protter P. (2004) we work in an arbitrage-free setting assuming a supply curve for each asset. In discrete time, following the ideas in Schweizer M. (1998) and Lamberton D., Pham H., Schweizer M. (1998) we prove the existence of a locally risk-minimizing strategy under mild conditions on the price process. Under stochastic and time-dependent liquidity risk we give a closed-form solution for an optimal strategy in the case of a linear supply curve model. Finally we show how our hedging method can be applied in energy markets where futures with different maturities are available for trading. The futures closest to their delivery period are usually the most liquid but depending on the contingent claim not necessary optimal in terms of hedging. In a simulation study we investigate this tradeoff and compare the resulting hedge strategies with the classical ones.

Date: 2017-05, Revised 2018-06
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Published in International Journal of Theoretical and Applied Finance, Vol. 21, No. 4 (2018) (44 pages)

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Persistent link: https://EconPapers.repec.org/RePEc:arx:papers:1705.06918

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