JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2024, Vol. 59 ›› Issue (4): 98-107.doi: 10.6040/j.issn.1671-9352.0.2022.629

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Perpetual American lookback option pricing under mixed bi-fractional Brownian motion

Yaru ZHANG1(),Li XIA1,2,*(),Dianqiu ZHANG1   

  1. 1. School of Statistics and Mathematics, Guangdong University of Finance and Economics, Guangzhou 510320, Guangdong, China
    2. Big Data and Educational Statistics Application Laboratory, Guangdong University of Finance and Economics, Guangzhou 510320, Guangdong, China
  • Received:2022-11-28 Online:2024-04-20 Published:2024-04-12
  • Contact: Li XIA E-mail:1075214382@qq.com;xaleysherry@163.com

Abstract:

A pricing model for a perpetual American lookback option with dividends driven by mixed bi-fractional Brownian motion is constructed in this paper. First, the partial differential equations of mixed bi-fractional Brownian motion for perpetual American lookback call and put options are given by the Δ-hedging principle. Then, the established partial differential equations are solved by variable substitution method and characteristic equation method. Finally, numerical experiments are adopted to verify the linear proportional scaling properties of the solution, and the effects of mixed bi-fractional Brownian motion parameters H, K and volatility on the option prices are further discussed.

Key words: mixed bi-fractional Brownian motion, perpetual American lookback option, option pricing

CLC Number: 

  • O211.6

Fig.1

Bi-fractional Brownian motion simulation asset prices"

Fig.2

Simulation diagram of asset price path"

Fig.3

Linear equal scale properties"

Table 1

Pricing results of perpetual American lookback option under different H、K"

HKλ1λ2zcC
0.750.707.691 8-0.095 30.087 07.406 3
0.750.757.237 1-0.094 30.086 27.425 0
0.750.806.821 3-0.093 30.085 37.445 0
0.850.607.885 7-0.095 70.087 37.399 0
0.850.706.874 6-0.093 40.085 57.442 0
0.850.806.046 0-0.091 10.083 57.489 0
0.700.757.691 8-0.095 30.087 07.406 3
0.750.757.237 1-0.094 30.086 27.425 0
0.850.756.440 3-0.092 30.084 57.465 0
0.650.857.354 3-0.094 60.086 47.420 0
0.750.856.440 3-0.092 30.084 57.465 0
0.850.855.687 2-0.089 80.082 47.514 0

Fig.4

Changes of perpetual American lookback call options with volatility"

Table 2

Pricing results of perpetual American lookback option under different σ1、σ2"

σ1σ2λ1λ2zcC
0.200.306.821 3-0.093 30.085 37.444 6
0.250.355.143 2-0.087 60.080 67.559 1
0.300.404.099 7-0.081 80.075 67.681 6
0.350.453.407 5-0.076 00.070 67.807 0
0.400.502.924 8-0.070 40.658 07.931 2
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