英文标题:
《CVA and vulnerable options in stochastic volatility models》
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作者:
Elisa Alos, Fabio Antonelli, Alessandro Ramponi, Sergio Scarlatti
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最新提交年份:
2019
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英文摘要:
In this work we want to provide a general principle to evaluate the CVA (Credit Value Adjustment) for a vulnerable option, that is an option subject to some default event, concerning the solvability of the issuer. CVA is needed to evaluate correctly the contract and it is particularly important in presence of WWR (Wrong Way Risk), when a credit deterioration determines an increase of the claim\'s price. In particular, we are interested in evaluating the CVA in stochastic volatility models for the underlying\'s price (which often fit quite well the market\'s prices) when admitting correlation with the default event. By cunningly using Ito\'s calculus, we provide a general representation formula applicable to some popular models such as SABR, Hull \\& White and Heston, which explicitly shows the correction in CVA due to the processes correlation. Later, we specialize this formula and construct its approximation for the three selected models. Lastly, we run a numerical study to test the formula\'s accuracy, comparing our results with Monte Carlo simulations.
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中文摘要:
在这项工作中,我们希望提供一个一般原则来评估脆弱期权的CVA(信用价值调整),这是一个受制于某些违约事件的期权,涉及发行人的可解性。CVA需要正确评估合同,当信用恶化决定索赔价格上涨时,在存在WWR(错误方向风险)的情况下尤为重要。特别是,当承认与违约事件的相关性时,我们有兴趣在随机波动率模型中评估标的价格(通常与市场价格非常吻合)的CVA。通过巧妙地使用伊藤微积分,我们提供了一个适用于一些流行模型(如SABR、Hull \\&White和Heston)的通用表示公式,该公式明确显示了CVA中由于过程相关性而产生的修正。之后,我们专门化这个公式,并为三个选定的模型构造其近似值。最后,我们进行了数值研究以检验公式的准确性,并将我们的结果与蒙特卡罗模拟进行了比较。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Computational Finance 计算金融学
分类描述:Computational methods, including Monte Carlo, PDE, lattice and other numerical methods with applications to financial modeling
计算方法,包括蒙特卡罗,偏微分方程,格子和其他数值方法,并应用于金融建模
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一级分类:Quantitative Finance 数量金融学
二级分类:Pricing of Securities 证券定价
分类描述:Valuation and hedging of financial securities, their derivatives, and structured products
金融证券及其衍生产品和结构化产品的估值和套期保值
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