Extreme-strike asymptotics for general Gaussian stochastic volatility models
Extreme-strike asymptotics for general Gaussian stochastic volatility models
复制标题
一般高斯随机波动率模型的极端走向渐近
DOI:
10.1007/s10436-018-0338-z
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发表时间:
2019
影响因子:
1
通讯作者:
Zhang, Xin
中科院分区:
文献类型:
--
作者:
Gulisashvili, Archil;Viens, Frederi;Zhang, Xin
We consider a stochastic volatility asset price model in which the volatility is the absolute value of a continuous Gaussian process with arbitrary prescribed mean and covariance. By exhibiting a Karhunen–Loève expansion for the integrated variance, and using sharp estimates of the density of a general second-chaos variable, we derive asymptotics for the asset price density for large or small values of the variable, and study the wing behavior of the implied volatility in these models. Our main result provides explicit expressions for the first three terms in the expansion of the implied volatility, based on three basic spectral-type statistics of the Gaussian process: the top eigenvalue of its covariance operator, the multiplicity of this eigenvalue, and thenorm of the projection of the mean function on the top eigenspace. Numerical illustrations using the Stein–Stein and fractional Stein–Stein models are presented, including strategies for parameter calibration.
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DOI:
10.1007/978-3-540-71297-8_14
发表时间:
2009
期刊:
--
影响因子:
--
作者:
Clifford M. Hurvich;P. Soulier
通讯作者:
P. Soulier
DOI:
10.1142/s0219024912500203
发表时间:
2012
影响因子:
0.5
作者:
Archil Gulisashvili
通讯作者:
Archil Gulisashvili
影响因子:
3
作者:
Deuschel, J. D.;Friz, P. K.;Violante, S.
通讯作者:
Violante, S.
DOI:
--
发表时间:
2013
期刊:
arXiv: Probability
影响因子:
--
作者:
S. Corlay
通讯作者:
S. Corlay
影响因子:
1.8
作者:
Archil Gulisashvili;E. Stein
通讯作者:
E. Stein