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A Levy-driven rainfall model with applications to futures pricing

机译:征费驱动的降雨模型及其在期货定价中的应用

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摘要

We propose a parsimonious stochastic model for characterising the distributional and temporal properties of rainfall. The model is based on an integrated Ornstein-Uhlenbeck process driven by the Hougaard Levy process. We derive properties of this process and propose an extended model which generalises the Ornstein-Uhlenbeck process to the class of continuous-time ARMA processes. The model is illustrated by fitting it to empirical rainfall data on both daily and hourly time scales. It is shown that the model is sufficiently flexible to capture important features of the rainfall process across locations and time scales. Finally, we study an application to the pricing of rainfall derivatives which introduces the market price of risk via the Esscher transform. We first give a result specifying the risk-neutral expectation of a general moving average process. Then we illustrate the pricing method by calculating futures prices based on empirical daily rainfall data, where the rainfall process is specified by our model.
机译:我们提出了一种用于描述降雨的分布和时间特性的简约随机模型。该模型基于由Hougaard Levy流程驱动的集成Ornstein-Uhlenbeck流程。我们推导了该过程的性质,并提出了一个扩展模型,该模型将Ornstein-Uhlenbeck过程概括为连续时间ARMA过程。通过将模型拟合到每日和每小时时间尺度上的经验降雨数据进行说明。结果表明,该模型具有足够的灵活性,可以捕获跨位置和时标的降雨过程的重要特征。最后,我们研究了降雨衍生产品定价的应用,该应用通过Esscher变换引入了风险的市场价格。我们首先给出一个指定一般移动平均过程的风险中性预期的结果。然后,我们通过基于经验的每日降雨量数据计算期货价格来说明定价方法,其中降雨过程由我们的模型指定。

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  • 来源
    《AStA Advances in statistical analysis》 |2015年第4期|403-432|共30页
  • 作者单位

    Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England|Univ London Imperial Coll Sci Technol & Med, Grantham Inst Climate Change, London SW7 2AZ, England;

    Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England;

    Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England;

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