论文标题
具有凸风险措施的金融衍生品的同等风险定价和对冲
Equal Risk Pricing and Hedging of Financial Derivatives with Convex Risk Measures
论文作者
论文摘要
在本文中,我们考虑了同等风险定价和对冲的问题,即选择的公平价格是将合同双方暴露于同一风险水平的价格。首次将重点放在根据凸风险措施衡量风险的情况下,我们确定该问题减少了独立解决作者和买方的对冲问题,而零初始资本则减少了。通过进一步施加以满足马尔可夫财产的方式分解风险措施,我们提供了动态的编程方程,可用于解决欧美期权的情况。我们所有的结果都足够笼统,足以适应风险根据最坏的风险措施来衡量风险的情况,这是在强大的优化中通常所做的。我们的数值研究说明了相同风险定价的优势,而仅说明单个方,基于二次套期保值的定价(即$ε$ - 贵重定价)或基于固定等价的赛车措施(即黑色 - 乔尔定价)的定价。特别是,数值结果证实,在采用同等风险价格时,作者和买家最终都会受到风险,这些风险比他们在其他方法中所经历的更相似,平均而言要小。
In this paper, we consider the problem of equal risk pricing and hedging in which the fair price of an option is the price that exposes both sides of the contract to the same level of risk. Focusing for the first time on the context where risk is measured according to convex risk measures, we establish that the problem reduces to solving independently the writer and the buyer's hedging problem with zero initial capital. By further imposing that the risk measures decompose in a way that satisfies a Markovian property, we provide dynamic programming equations that can be used to solve the hedging problems for both the case of European and American options. All of our results are general enough to accommodate situations where the risk is measured according to a worst-case risk measure as is typically done in robust optimization. Our numerical study illustrates the advantages of equal risk pricing over schemes that only account for a single party, pricing based on quadratic hedging (i.e. $ε$-arbitrage pricing), or pricing based on a fixed equivalent martingale measure (i.e. Black-Scholes pricing). In particular, the numerical results confirm that when employing an equal risk price both the writer and the buyer end up being exposed to risks that are more similar and on average smaller than what they would experience with the other approaches.