scholarly journals Regime-Switching Risk: To Price or Not to Price?

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Tak Kuen Siu
Keyword(s):  
Relative Entropy ◽  
Regime Switching ◽  
Martingale Measure ◽  
Martingale Measures ◽  
Equivalent Martingale Measure ◽  
Equivalent Martingale Measures ◽  
Black Scholes ◽  
Normative Issues ◽  
Equivalent Martingale ◽  
Markovian Regime Switching

Should the regime-switching risk be priced? This is perhaps one of the important “normative” issues to be addressed in pricing contingent claims under a Markovian, regime-switching, Black-Scholes-Merton model. We address this issue using a minimal relative entropy approach. Firstly, we apply a martingale representation for a double martingale to characterize the canonical space of equivalent martingale measures which may be viewed as the largest space of equivalent martingale measures to incorporate both the diffusion risk and the regime-switching risk. Then we show that an optimal equivalent martingale measure over the canonical space selected by minimizing the relative entropy between an equivalent martingale measure and the real-world probability measure does not price the regime-switching risk. The optimal measure also justifies the use of the Esscher transform for option valuation in the regime-switching market.

scholarly journals Pricing Participating Products under a Generalized Jump-Diffusion Model

2008 ◽  
Vol 2008 ◽  
pp. 1-30 ◽  
Author(s):  
Tak Kuen Siu ◽  
John W. Lau ◽  
Hailiang Yang
Keyword(s):  
Diffusion Model ◽  
Life Insurance ◽  
Regime Switching ◽  
Jump Diffusion ◽  
Martingale Measure ◽  
Practical Implementation ◽  
Switching Models ◽  
Jump Diffusion Model ◽  
Equivalent Martingale ◽  
Markovian Regime Switching

We propose a model for valuing participating life insurance products under a generalized jump-diffusion model with a Markov-switching compensator. It also nests a number of important and popular models in finance, including the classes of jump-diffusion models and Markovian regime-switching models. The Esscher transform is employed to determine an equivalent martingale measure. Simulation experiments are conducted to illustrate the practical implementation of the model and to highlight some features that can be obtained from our model.

scholarly journals Martingale measures in the market with restricted information

2006 ◽  
Vol 2006 ◽  
pp. 1-7
Author(s):  
Yang Jianqi ◽  
Yan Haifeng ◽  
Liu Limin
Keyword(s):  
Market Model ◽  
Martingale Measure ◽  
Martingale Measures ◽  
Information Market ◽  
Information Markets ◽  
Minimal Martingale Measure ◽  
Equivalent Martingale Measures ◽  
Equivalent Martingale ◽  
Explicit Relation

This paper considers the problem of the market with restricted information. By constructing a restricted information market model, the explicit relation of arbitrage and the minimal martingale measure between two different information markets are discussed. Also a link among all equivalent martingale measures under restricted information market is given.

scholarly journals Option Pricing Driven by a Telegraph Process with Random Jumps

2012 ◽  
Vol 49 (3) ◽  
pp. 838-849 ◽  
Author(s):  
Oscar López ◽  
Nikita Ratanov
Keyword(s):  
Option Pricing ◽  
Financial Market ◽  
Option Prices ◽  
Martingale Measures ◽  
Market Models ◽  
Telegraph Process ◽  
Equivalent Martingale Measures ◽  
Hedging Strategies ◽  
Random Jumps ◽  
Equivalent Martingale

In this paper we propose a class of financial market models which are based on telegraph processes with alternating tendencies and jumps. It is assumed that the jumps have random sizes and that they occur when the tendencies are switching. These models are typically incomplete, but the set of equivalent martingale measures can be described in detail. We provide additional suggestions which permit arbitrage-free option prices as well as hedging strategies to be obtained.

scholarly journals Pricing Exotic Options under a High-Order Markovian Regime Switching Model

2007 ◽  
Vol 2007 ◽  
pp. 1-15 ◽  
Author(s):  
Wai-Ki Ching ◽  
Tak-Kuen Siu ◽  
Li-Min Li
Keyword(s):  
Regime Switching ◽  
Order Effect ◽  
High Order ◽  
Martingale Measure ◽  
Exotic Options ◽  
Lookback Options ◽  
Path Dependent ◽  
Markovian Regime Switching ◽  
The Impact ◽  
Markovian Regime

We consider the pricing of exotic options when the price dynamics of the underlying risky asset are governed by a discrete-time Markovian regime-switching process driven by an observable, high-order Markov model (HOMM). We assume that the market interest rate, the drift, and the volatility of the underlying risky asset's return switch over time according to the states of the HOMM, which are interpreted as the states of an economy. We will then employ the well-known tool in actuarial science, namely, the Esscher transform to determine an equivalent martingale measure for option valuation. Moreover, we will also investigate the impact of the high-order effect of the states of the economy on the prices of some path-dependent exotic options, such as Asian options, lookback options, and barrier options.

scholarly journals Complications with stochastic volatility models

1998 ◽  
Vol 30 (01) ◽  
pp. 256-268 ◽  
Author(s):  
Carlos A. Sin
Keyword(s):  
Stochastic Volatility ◽  
Stock Price ◽  
Local Martingale ◽  
Stochastic Volatility Models ◽  
Martingale Measures ◽  
Equivalent Martingale Measures ◽  
Volatility Models ◽  
Equivalent Martingale

We show a class of stock price models with stochastic volatility for which the most natural candidates for martingale measures are only strictly local martingale measures, contrary to what is usually assumed in the finance literature. We also show the existence of equivalent martingale measures, and provide one explicit example.

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