Abstract
We consider a surplus process of a drifted fractional Brownian motion with the Hurst index \(H>1/2\), which appears as a functional limit of drifted compound Poisson risk models with correlated claims. This is a kind of representation of a surplus with a long memory. Our interest is to construct confidence intervals of the ruin probability of the surplus when the volatility parameter is unknown. We obtain the derivative of the ruin probability w.r.t. the volatility parameter via the Malliavin calculus, and apply the delta method to identify the asymptotic distribution of an estimated ruin probability.
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Acknowledgements
The authors express sincere thanks to Prof. A. Kohats-Higa for the valuable discussion related to the part of Malliavin calculus. This research was partially supported by JSPS KAKENHI Grant-in-Aid for Scientific Research (C) #21K03358.
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Nakamura, S., Shimizu, Y. (2023). Estimating Finite-Time Ruin Probability of Surplus with Long Memory via Malliavin Calculus. In: Liu, Y., Hirukawa, J., Kakizawa, Y. (eds) Research Papers in Statistical Inference for Time Series and Related Models. Springer, Singapore. https://doi.org/10.1007/978-981-99-0803-5_20
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DOI: https://doi.org/10.1007/978-981-99-0803-5_20
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