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Sensitivities and Hedging of the Collateral Choice Option

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  • Griselda Deelstra
  • Lech A. Grzelak
  • Felix L. Wolf

Abstract

The collateral choice option allows a collateral-posting party the opportunity to change the type of security in which the collateral is deposited. Due to non-zero collateral basis spreads, this optionality significantly impacts asset valuation. Because of the complexity of valuing the option, many practitioners resort to deterministic assumptions on the collateral rates. In this article, we focus on a valuation model of the collateral choice option based on stochastic dynamics. Intrinsic differences in the resulting collateral choice option valuation and its implications for collateral management are presented. We obtain sensitivities of the collateral choice option price under both the deterministic and the stochastic model, and we show that the stochastic model attributes risks to all involved collateral currencies. Besides an inability to capture volatility effects, the deterministic model exhibits a digital structure in which only the cheapest-to-deliver currency influences the valuation at a given time. We further consider hedging an asset with the collateral choice option by a portfolio of domestic and foreign zero-coupon bonds that do not carry the collateral choice option. We propose static hedging strategies based on the crossing times of the deterministic model and based on variance-minimization under the stochastic model. We show how the weights of this model can be explicitly determined with the semi-analytical common factor approach and we show in numerical experiments that this strategy offers good hedging performance under minimized variance.

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  • Griselda Deelstra & Lech A. Grzelak & Felix L. Wolf, 2022. "Sensitivities and Hedging of the Collateral Choice Option," Papers 2207.10373, arXiv.org, revised Aug 2022.
    • Handle: RePEc:arx:papers:2207.10373
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    References listed on IDEAS

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    1. Cornelis W Oosterlee & Lech A Grzelak, 2019. "Mathematical Modeling and Computation in Finance:With Exercises and Python and MATLAB Computer Codes," World Scientific Books, World Scientific Publishing Co. Pte. Ltd., number q0236, February.
    2. F. L. Wolf & L. A. Grzelak & G. Deelstra, 2022. "Cheapest-to-deliver collateral: a common factor approach," Quantitative Finance, Taylor & Francis Journals, vol. 22(4), pages 707-723, April.
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