• 제목/요약/키워드: Black·Scholes

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장기(長期)옵션에 내재(內在)된 주가변동성(株價變動性)의 위험(危險)프레미엄에 관한 연구(硏究)

  • 정문경
    • 재무관리연구
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    • 제9권1호
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    • pp.35-55
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    • 1992
  • Black과 Scholes가 옵션가격모형(價格模型)을 개발한 후 그 모형에서의 가정들을 완화시킴으로써 옵션모형들이 발전되어 왔다. Black-Scholes의 옵션가격모형(價格模型)의 문제점중의 하나는 주가의 분산이 만기일까지 일정(一定)하다는 가정이다. 본 연구에서는 장기옵션이 Scorer 이용하여 주가분산(株價分散)의 중요성을 고찰하였다. 즉 Cox, Ingersoll과 Ross의 일반균형이론(一般均衡理論)에 근거한 random variance 옵션모형을 도출하였고 이것을 Black-Scholes 옵션모형과 비교하였다. 장기유럽식 옵션에 대하여 주가변동성(株價變動性)의 위험(危險)프레미엄이 중요한 요소이고 위험(危險)프레미엄을 고려한 random variance 옵션모형이 위험(危險)을 고려치 않는 random variance옵션모형(模型)보다 예측력이 높게 나타났다.

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L$\acute{e}$vy과정 하에서 추세와 도약이 있는 경우 옵션가격결정모형 : Gerber-Shiu 모형을 중심으로 (Option Pricing Models with Drift and Jumps under L$\acute{e}$vy processes : Beyond the Gerber-Shiu Model)

  • 조승모;이필상
    • 재무관리연구
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    • 제24권4호
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    • pp.1-43
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    • 2007
  • 전통적인 옵션가격결정모형인 블랙-숄즈 모형(Black-Scholes model)은 기초자산의 로그수익률(log-return)이 브라운운동(Brownian motion)을 따른다는 가정에 기반을 두고 있다. 그러나 이 가정은 현실적인 한계가 많은 것으로 비판을 받아 왔다. 이에 따라 지난 20여 년간 브라운 운동 이외에 새로운 확률과정을 도입한 모형들이 연구되고 도출되었다. 최근에는 레비과정(L$\acute{e}$vy process)에 기반한 모형들이 활발히 연구되어오고 있는데, 그 기원은 1994년 거버(Gerber)와 쉬우(Shiu)에 의한 거버-쉬우 모형(Gerber-Shiu model)이다. 2004년 치앙(Cheang)은, 거버-쉬우 모형이 하나의 레비과정을 가정한 데 비해, 복수의 독립적인 레비과정을 가정하여 옵션가격결정모형을 유도함으로써 거버-쉬우 모형을 추세(drift)와 도약(jump)을 갖는 경우로 확장할 수 있는 가능성을 제시하였다. 본 논문에서는 치앙의 모형을 이용하여 레비과정 하에서의 추세와 도약을 갖는 거버-쉬우 모형을 유도하였다. 여기에 감마분포를 도입하여 1993년에 도출된 헤스톤 모형(Heston model)에 도약을 도입한 형태의 모형을 유도하였다. 아울러 이렇게 유도된 모형에 대하여 KOSPI200 지수 옵션 자료를 사용해서 블랙-숄즈 모형과의 가격설명력을 비교하였다. 그 결과, 본 논문에서 유도된 모형이 블랙-숄즈 모형 이상의 가격설명력을 보이는 것으로 나타났다.

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On Pricing Equity-Linked Investment Products with a Threshold Expense Structure

  • Bae, Tae-Han;Ko, Bang-Won
    • 응용통계연구
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    • 제23권4호
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    • pp.621-633
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    • 2010
  • This paper considers a certain expense structure where a vendor of equity-linked investment product will collect its expenses continuously from the investor's account whenever the investment performance exceeds a certain threshold level. Under the Black-Scholes framework, we derive compact convolution formulas for evaluating the total expenses to be collected during the investment period by using the joint Laplace transform of the Brownian motion and its excursion time. We provide numerical examples for illustration.

APPROXIMATIONS OF OPTION PRICES FOR A JUMP-DIFFUSION MODEL

  • Wee, In-Suk
    • 대한수학회지
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    • 제43권2호
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    • pp.383-398
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    • 2006
  • We consider a geometric Levy process for an underlying asset. We prove first that the option price is the unique solution of certain integro-differential equation without assuming differentiability and boundedness of derivatives of the payoff function. Second result is to provide convergence rate for option prices when the small jumps are removed from the Levy process.

Asymptotic computation of Greeks under a stochastic volatility model

  • Park, Sang-Hyeon;Lee, Kiseop
    • Communications for Statistical Applications and Methods
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    • 제23권1호
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    • pp.21-32
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    • 2016
  • We study asymptotic expansion formulae for numerical computation of Greeks (i.e. sensitivity) in finance. Our approach is based on the integration-by-parts formula of the Malliavin calculus. We propose asymptotic expansion of Greeks for a stochastic volatility model using the Greeks formula of the Black-Scholes model. A singular perturbation method is applied to derive asymptotic Greeks formulae. We also provide numerical simulation of our method and compare it to the Monte Carlo finite difference approach.

A CLOSED-FORM SOLUTION FOR LOOKBACK OPTIONS USING MELLIN TRANSFORM APPROACH

  • Jeon, Junkee;Yoon, Ji-Hun
    • East Asian mathematical journal
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    • 제32권3호
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    • pp.301-310
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    • 2016
  • Lookback options, in the terminology of nance, are a type of exotic option with path dependency whose the payoff depends on the optimal (maximum or minimum) underlying asset's price occurring over the life of the option. In this paper, we exploit Mellin transform techniques to find a closed-form solution for European lookback options in Black-Scholes model.

AN APPROXIMATED EUROPEAN OPTION PRICE UNDER STOCHASTIC ELASTICITY OF VARIANCE USING MELLIN TRANSFORMS

  • Kim, So-Yeun;Yoon, Ji-Hun
    • East Asian mathematical journal
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    • 제34권3호
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    • pp.239-248
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    • 2018
  • In this paper, we derive a closed-form formula of a second-order approximation for a European corrected option price under stochastic elasticity of variance model mentioned in Kim et al. (2014) [1] [J.-H. Kim, J Lee, S.-P. Zhu, S.-H. Yu, A multiscale correction to the Black-Scholes formula, Appl. Stoch. Model. Bus. 30 (2014)]. To find the explicit-form correction to the option price, we use Mellin transform approaches.

AN EFFICIENT BINOMIAL TREE METHOD FOR CLIQUET OPTIONS

  • Moon, Kyoung-Sook;Kim, Hong-Joong
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제15권2호
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    • pp.83-96
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    • 2011
  • This work proposes a binomial method for pricing the cliquet options, which provide a guaranteed minimum annual return. The proposed binomial tree algorithm simplifies the standard binomial approach, which is problematic for cliquet options in the computational point of view, or other recent methods, which may be of intricate algorithm or require pre- or post-processing computations. Our method is simple, efficient and reliable in a Black-Scholes framework with constant interest rates and volatilities.

HEDGING OPTION PORTFOLIOS WITH TRANSACTION COSTS AND BANDWIDTH

  • KIM, SEKI
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제4권2호
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    • pp.77-84
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    • 2000
  • Black-Scholes equation arising from option pricing in the presence of cost in trading the underlying asset is derived. The transaction cost is chosen precisely and generalized to reflect the trade in the real world. Furthermore the concept of the bandwidth is introduced to obtain the better rehedging. The model with bandwidth derived in this paper can be used to calculate the more accurate option price numerically even if it is nonlinear and more complicated than the models shown before.

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SIMULATIONS IN OPTION PRICING MODELS APPLIED TO KOSPI200

  • Lee, Jon-U;Kim, Se-Ki
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제7권2호
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    • pp.13-22
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    • 2003
  • Simulations on the nonlinear partial differential equation derived from Black-Scholes equation with transaction costs are performed. These numerical experiments using finite element methods are applied to KOSPI200 in 2002 and the option prices obtained with transaction costs are closer to the real prices in market than the prices used in Korea Stock Exchange.

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