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Weather derivatives pricing using regim switching models

機(jī)譯:使用Regim轉(zhuǎn)換模型的天氣衍生產(chǎn)品定價(jià)

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摘要

In this study we discuss the pricing of weather derivatives whose underlying weather variable is temperature. The dynamics of temperature in this study follows a two state regime switching model with a heteroskedastic mean reverting process as the base regime and a shifted regime defined by Brownian motion with mean different from zero. We develop the mathematical formulas for pricing futures contract on heating degree days (HDDs), cooling degree days (CDDs) and cumulative average temperature (CAT) indices. We also present the mathematical expressions for pricing the corresponding options on futures contracts for the same temperature indices. The local volatility nature of the model in the base regime captures very well the dynamics of the underlying process, thus leading to a better pricing processes for temperature derivatives contracts written on various index variables. We provide the description of Montecarlo simulation method for pricing weather derivatives under this model and use it to price a few weather derivatives call option contracts.
機(jī)譯:在這項(xiàng)研究中,我們討論了天氣衍生品的定價(jià),其潛在的天氣變量是溫度。在這項(xiàng)研究中,溫度的動(dòng)力學(xué)遵循兩種狀態(tài)轉(zhuǎn)換模型,其中異方差均值回復(fù)過(guò)程為基本狀態(tài),而布朗運(yùn)動(dòng)定義的平移狀態(tài)的均值不同于零。我們開發(fā)了用于根據(jù)加熱程度日(HDD),冷卻程度日(CDD)和累積平均溫度(CAT)指數(shù)對(duì)期貨合約定價(jià)的數(shù)學(xué)公式。我們還提供了數(shù)學(xué)表達(dá)式,用于對(duì)相同溫度指數(shù)的期貨合約的相應(yīng)期權(quán)定價(jià)?;局贫戎心P偷木植坎▌?dòng)性很好地捕捉了基礎(chǔ)過(guò)程的動(dòng)態(tài),因此導(dǎo)致了針對(duì)各種指數(shù)變量編寫的溫度衍生合約的更好的定價(jià)過(guò)程。我們提供了在此模型下用于對(duì)天氣衍生產(chǎn)品定價(jià)的蒙特卡洛模擬方法的描述,并使用它來(lái)為一些天氣衍生品看漲期權(quán)合約定價(jià)。

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