Lecture 1: Lévy processes
|
|
- Percival Hubert Anderson
- 5 years ago
- Views:
Transcription
1 Lecture 1: Lévy processes A. E. Kyprianou Department of Mathematical Sciences, University of Bath 1/ 22
2 Lévy processes 2/ 22
3 Lévy processes A process X = {X t : t 0} defined on a probability space (Ω, F, P) is said to be a (one dimensional) Lévy process if it possesses the following properties: (i) The paths of X are P-almost surely right continuous with left limits. (ii) P(X 0 = 0) = 1. (iii) For 0 s t, X t X s is equal in distribution to X t s. (iv) For 0 s t, X t X s is independent of {X u : u s}. 2/ 22
4 Lévy processes A process X = {X t : t 0} defined on a probability space (Ω, F, P) is said to be a (one dimensional) Lévy process if it possesses the following properties: (i) The paths of X are P-almost surely right continuous with left limits. (ii) P(X 0 = 0) = 1. (iii) For 0 s t, X t X s is equal in distribution to X t s. (iv) For 0 s t, X t X s is independent of {X u : u s}. Some familiar examples (i) Linear Brownian motion σb t at, t 0, σ, a R. (ii) Poisson process with λ, N = {N t : t 0}. (iii) Compound Poisson processes with drift N t ξ i + ct, t 0, i=1 where {ξ i : i 1} are i.i.d. and c R. 2/ 22
5 Lévy processes Note that in the last case of a compound Poisson process with drift, if we assume that E( ξ 1 ) = x F (dx) < and choose c = λ xf (dx), R R then the centred compound Poisson process N t i=1 ξ i λt xf (dx), t 0, R is both a Lévy process and a martingale. 3/ 22
6 Lévy processes Note that in the last case of a compound Poisson process with drift, if we assume that E( ξ 1 ) = x F (dx) < and choose c = λ xf (dx), R R then the centred compound Poisson process N t i=1 ξ i λt xf (dx), t 0, R is both a Lévy process and a martingale. Any linear combination of independent Lévy processes is a Lévy process. 3/ 22
7 The Lévy-Khintchine formula 4/ 22
8 The Lévy-Khintchine formula As a consequence of stationary and independent increments it can be shown that any Lévy process X = {X t : t 0} has the property that, for all t 0 and θ, E(e iθx t ) = e Ψ(θ)t where Ψ(θ) = log E(e iθx 1 ) is called the characteristic exponent. 4/ 22
9 The Lévy-Khintchine formula As a consequence of stationary and independent increments it can be shown that any Lévy process X = {X t : t 0} has the property that, for all t 0 and θ, E(e iθx t ) = e Ψ(θ)t where Ψ(θ) = log E(e iθx 1 ) is called the characteristic exponent. Theorem. The function Ψ : R C is the characteristic of a Lévy process if and only if Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx1 ( x <1) )Π(dx). R where σ R, a R and Π is a measure concentrated on R\{0} which respects the integrability condition (1 x 2 )Π(dx) <. R 4/ 22
10 Key examples of L-K formula 5/ 22
11 Key examples of L-K formula For the case of σb t at, Ψ(θ) = iaθ σ2 θ 2. 5/ 22
12 Key examples of L-K formula For the case of σb t at, Ψ(θ) = iaθ σ2 θ 2. For the case of a compound Poisson process N t i=1 ξi, where the the i.i.d. variables {ξ i : i 1} have common distribution F and the Poisson process of jumps has rate λ, Ψ(θ) = (1 e iθx )λf (dx) R 5/ 22
13 Key examples of L-K formula For the case of σb t at, Ψ(θ) = iaθ σ2 θ 2. For the case of a compound Poisson process N t i=1 ξi, where the the i.i.d. variables {ξ i : i 1} have common distribution F and the Poisson process of jumps has rate λ, Ψ(θ) = (1 e iθx )λf (dx) R For the case of independent linear combinations, let X t = σb t + at + N t i=1 ξi λ x F (dx)t, where N has rate λ and R {ξ i : i 1} have common distribution F satisfying x F (dx) < R Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx)λf (dx) R 5/ 22
14 The Lévy-Itô decomposition Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx)λf (dx) R Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx1 ( x <1) )Π(dx). R 6/ 22
15 The Lévy-Itô decomposition Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx)λf (dx) R Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx1 ( x <1) )Π(dx). R Ψ(θ) = {iaθ + 12 } { } σ2 θ 2 + (1 e iθx )λ 0F 0(dx) x 1 + { } (1 e iθx + iθx)λ nf n(dx) n 0 2 (n+1) x <2 n where λ 0 = Π(R\( 1, 1)) and λ n = Π({x : 2 (n+1) x < 2 n }) F 0(dx) = λ 1 0 Π(dx) { x 1} and F n(dx) = λ 1 n Π(dx) {x:2 (n+1) x <2 n } 7/ 22
16 The Lévy-Itô decomposition Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx)λf (dx) R Ψ(θ) = iaθ σ2 θ 2 + (1 e iθx + iθx1 ( x <1) )Π(dx). R Suggestive that for any permitted triple (a, σ, Π) the associated Lévy processes can be written as the independent sum N t 0 N t n X t = at + σb t + ξi 0 + ξi n xλ nf n(dx) 2 (n+1) x <2 n i=1 n=1 i=1 where {ξi n : i 0} are families of i.i.d. random variables with respective distributions F n and N n are Poisson processes with respective arrival rates λ n The condition R (1 x2 )Π(dx) < ensures that all these processes "add up". 8/ 22
17 Brownian motion / 22
18 Compound Poisson process / 22
19 Brownian motion + compound Poisson process / 22
20 Unbounded variation paths / 22
21 Bounded variation paths / 22
22 Bounded vs unbounded variation paths 14/ 22
23 Bounded vs unbounded variation paths Paths of a Lévy processes are either almost surely of bounded variation over all finite time horizons or almost surely of unbounded variation over all finite time horizons. 14/ 22
24 Bounded vs unbounded variation paths Paths of a Lévy processes are either almost surely of bounded variation over all finite time horizons or almost surely of unbounded variation over all finite time horizons. Distinguishing the two cases can be identified from the Lévy-Itô decomposition: N t 0 N t n X t = at + σb t + ξi 0 + ξi n xπ(dx) 2 (n+1) x <2 n i=1 n=1 i=1 14/ 22
25 Bounded vs unbounded variation paths Paths of a Lévy processes are either almost surely of bounded variation over all finite time horizons or almost surely of unbounded variation over all finite time horizons. Distinguishing the two cases can be identified from the Lévy-Itô decomposition: N t 0 N t n X t = at + σb t + ξi 0 + ξi n xπ(dx) 2 (n+1) x <2 n i=1 n=1 Bounded variation if and only if σ = 0 and i=1 ( 1,1) x Π(dx) < 14/ 22
26 Infinite divisibility 15/ 22
27 Infinite divisibility Suppose that X is an R-valued random variable on (Ω, F, P), then X is infinitely divisible if for each n = 1, 2, 3,... X d = X (1,n) + + X (n,n) where {X (i,n) : i = 1,..., n} are independent and identically distributed and the equality is in distribution. 15/ 22
28 Infinite divisibility Suppose that X is an R-valued random variable on (Ω, F, P), then X is infinitely divisible if for each n = 1, 2, 3,... X d = X (1,n) + + X (n,n) where {X (i,n) : i = 1,..., n} are independent and identically distributed and the equality is in distribution. Said another way, if µ is the characteristic function of X then for each n = 1, 2, 3,... we have that µ = (µ n) n where µ n is the the characteristic function of some R-valued random variable. 15/ 22
29 Infinite divisibility Suppose that X is an R-valued random variable on (Ω, F, P), then X is infinitely divisible if for each n = 1, 2, 3,... X d = X (1,n) + + X (n,n) where {X (i,n) : i = 1,..., n} are independent and identically distributed and the equality is in distribution. Said another way, if µ is the characteristic function of X then for each n = 1, 2, 3,... we have that µ = (µ n) n where µ n is the the characteristic function of some R-valued random variable. For any Lévy process: X t = (X t X (n 1) t ) + (X (n 1) n t n X (n 2) t ) + + (X t 1 X n n 0) from which stationary and independent increments implies infinite divisibility. 15/ 22
30 Infinite divisibility Suppose that X is an R-valued random variable on (Ω, F, P), then X is infinitely divisible if for each n = 1, 2, 3,... X d = X (1,n) + + X (n,n) where {X (i,n) : i = 1,..., n} are independent and identically distributed and the equality is in distribution. Said another way, if µ is the characteristic function of X then for each n = 1, 2, 3,... we have that µ = (µ n) n where µ n is the the characteristic function of some R-valued random variable. For any Lévy process: X t = (X t X (n 1) t ) + (X (n 1) n t n X (n 2) t ) + + (X t 1 X n n 0) from which stationary and independent increments implies infinite divisibility. This goes part way to explaining why E(e iθx t ) = e Ψ(θ)t = [E(e iθx 1 )] t 15/ 22
31 Lévy processes in finance and insurance 16/ 22
32 Financial modelling: Share value, a day and a year 17/ 22
33 Financial modelling 18/ 22
34 Financial modelling Black Scholes model of a risky asset: S t = exp{x + σb t at}, t 0 (Initial value S 0 = e x ). Criticised at many levels. 18/ 22
35 Financial modelling Black Scholes model of a risky asset: S t = exp{x + σb t at}, t 0 (Initial value S 0 = e x ). Criticised at many levels. Lévy model of a risky asset: S t = exp{x + X t}, t 0. Does better than Black-Scholes on some issues (eg infinitely divisibility instead of Gaussian increments) but still generally viewed as a statistically poor fit with real data. 18/ 22
36 Financial modelling Black Scholes model of a risky asset: S t = exp{x + σb t at}, t 0 (Initial value S 0 = e x ). Criticised at many levels. Lévy model of a risky asset: S t = exp{x + X t}, t 0. Does better than Black-Scholes on some issues (eg infinitely divisibility instead of Gaussian increments) but still generally viewed as a statistically poor fit with real data. Modelling with a Lévy process means choosing the triplet (a, σ, Π). 18/ 22
37 Financial modelling Black Scholes model of a risky asset: S t = exp{x + σb t at}, t 0 (Initial value S 0 = e x ). Criticised at many levels. Lévy model of a risky asset: S t = exp{x + X t}, t 0. Does better than Black-Scholes on some issues (eg infinitely divisibility instead of Gaussian increments) but still generally viewed as a statistically poor fit with real data. Modelling with a Lévy process means choosing the triplet (a, σ, Π). The inclusion of σ is a choice of the inclusion of noise and the choice of Π models jump structure and a can be used to deal with so-called risk neutrality: The existence of a measure P under which X is a Lévy process satisfying E(e X T ) = e qt in other words Ψ( i) = q. 18/ 22
38 Some favourite Lévy processes in finance 19/ 22
39 Some favourite Lévy processes in finance The Kou model: η 1, η 2, λ > 0, p (0, 1), σ 2 0 and Π(dx) = λpη 1e η 1x 1 (x>0) dx + λ(1 p)η 2e η 2 x 1 (x<0) dx Ψ(θ) = iaθ σ2 θ 2 λpiθ λ(1 p)iθ + η 1 iθ η 2 + iθ 19/ 22
40 Some favourite Lévy processes in finance The Kou model: η 1, η 2, λ > 0, p (0, 1), σ 2 0 and Π(dx) = λpη 1e η 1x 1 (x>0) dx + λ(1 p)η 2e η 2 x 1 (x<0) dx Ψ(θ) = iaθ σ2 θ 2 The KoBoL/CGMY model: λpiθ λ(1 p)iθ + η 1 iθ η 2 + iθ σ 2 0 and Π(dx) = C e Mx x 1+Y 1 (x>0)dx + C e G x x 1+Y 1 (x<0)dx Ψ(θ) = iaθ σ2 θ 2 + CΓ( Y ){(M iθ) Y M Y + (G + iθ) Y G Y } 19/ 22
41 Some favourite Lévy processes in finance The Kou model: η 1, η 2, λ > 0, p (0, 1), σ 2 0 and Π(dx) = λpη 1e η 1x 1 (x>0) dx + λ(1 p)η 2e η 2 x 1 (x<0) dx Ψ(θ) = iaθ σ2 θ 2 The KoBoL/CGMY model: λpiθ λ(1 p)iθ + η 1 iθ η 2 + iθ σ 2 0 and Π(dx) = C e Mx x 1+Y 1 (x>0)dx + C e G x x 1+Y 1 (x<0)dx Ψ(θ) = iaθ σ2 θ 2 + CΓ( Y ){(M iθ) Y M Y + (G + iθ) Y G Y } Spectrally negative Lévy processes: σ 2 0 and Π(0, ) = 0. 19/ 22
42 Some favourite Lévy processes in finance The Kou model: η 1, η 2, λ > 0, p (0, 1), σ 2 0 and Π(dx) = λpη 1e η 1x 1 (x>0) dx + λ(1 p)η 2e η 2 x 1 (x<0) dx Ψ(θ) = iaθ σ2 θ 2 The KoBoL/CGMY model: λpiθ λ(1 p)iθ + η 1 iθ η 2 + iθ σ 2 0 and Π(dx) = C e Mx x 1+Y 1 (x>0)dx + C e G x x 1+Y 1 (x<0)dx Ψ(θ) = iaθ σ2 θ 2 + CΓ( Y ){(M iθ) Y M Y + (G + iθ) Y G Y } Spectrally negative Lévy processes: σ 2 0 and Π(0, ) = 0....and others... Variance Gamma, Meixner, Hyperbolic Lévy processes, β-lévy processes, θ-lévy processes, Hypergeometric Lévy processes,... 19/ 22
43 Need to know for option pricing 20/ 22
44 Need to know for option pricing Note: X is a Markov process. Can work with P x to mean P( X 0 = x). Standard theory dictates that the price of a European-type option over time horizon [0, T ] as a function of the initial value of the stock where q 0 is the discounting rate. E x(e qt (f(e X T )) 20/ 22
45 Need to know for option pricing Note: X is a Markov process. Can work with P x to mean P( X 0 = x). Standard theory dictates that the price of a European-type option over time horizon [0, T ] as a function of the initial value of the stock E x(e qt (f(e X T )) where q 0 is the discounting rate. More exotic financial derivatives require an understanding of first passage problems. 20/ 22
46 Need to know for option pricing Note: X is a Markov process. Can work with P x to mean P( X 0 = x). Standard theory dictates that the price of a European-type option over time horizon [0, T ] as a function of the initial value of the stock E x(e qt (f(e X T )) where q 0 is the discounting rate. More exotic financial derivatives require an understanding of first passage problems. The value of an American put with strike K > 0: E x(e qτ a (K e X τ a ) + ) where τ a = inf{t > 0 : X t < a} for some a R. 20/ 22
47 Need to know for option pricing Note: X is a Markov process. Can work with P x to mean P( X 0 = x). Standard theory dictates that the price of a European-type option over time horizon [0, T ] as a function of the initial value of the stock E x(e qt (f(e X T )) where q 0 is the discounting rate. More exotic financial derivatives require an understanding of first passage problems. The value of an American put with strike K > 0: E x(e qτ a (K e X τ a ) + ) where τ a = inf{t > 0 : X t < a} for some a R. Barrier option (up and out call with strike K > 0): for some b > log K. E x(e qt (e X t K) + 1 (sups t X s b)) 20/ 22
48 Need to know for option pricing Note: X is a Markov process. Can work with P x to mean P( X 0 = x). Standard theory dictates that the price of a European-type option over time horizon [0, T ] as a function of the initial value of the stock E x(e qt (f(e X T )) where q 0 is the discounting rate. More exotic financial derivatives require an understanding of first passage problems. The value of an American put with strike K > 0: E x(e qτ a (K e X τ a ) + ) where τ a = inf{t > 0 : X t < a} for some a R. Barrier option (up and out call with strike K > 0): E x(e qt (e X t K) + 1 (sups t X s b)) for some b > log K. More generally, complex instruments such as credit-default swaps and convertible contingencies are built upon the key mathematical ingredient P x(inf Xs > 0) s t 20/ 22
49 Insurance mathematics The first passage problem also occurs in the related setting of insurance mathematics. 21/ 22
50 Insurance mathematics The first passage problem also occurs in the related setting of insurance mathematics. The classical risk insurance ruin problem sees the wealth of an insurance problem modelled by the so-called Cramér-Lundberg process: N t X t := x + ct ξ i, with the understanding that x is the initial wealth, c is the rate at which premiums are collected and {N t : t 0} is a Poisson process describing the arrival of the i.i.d. claims {ξ i : i 0}. i=1 21/ 22
51 Insurance mathematics The first passage problem also occurs in the related setting of insurance mathematics. The classical risk insurance ruin problem sees the wealth of an insurance problem modelled by the so-called Cramér-Lundberg process: N t X t := x + ct ξ i, with the understanding that x is the initial wealth, c is the rate at which premiums are collected and {N t : t 0} is a Poisson process describing the arrival of the i.i.d. claims {ξ i : i 0}. i=1 This is nothing but a spectrally negative Lévy process. 21/ 22
52 Insurance mathematics The first passage problem also occurs in the related setting of insurance mathematics. The classical risk insurance ruin problem sees the wealth of an insurance problem modelled by the so-called Cramér-Lundberg process: N t X t := x + ct ξ i, with the understanding that x is the initial wealth, c is the rate at which premiums are collected and {N t : t 0} is a Poisson process describing the arrival of the i.i.d. claims {ξ i : i 0}. i=1 This is nothing but a spectrally negative Lévy process. A classical field of study, so called Gerber-Shiu, theory, concerns the study of the joint law of τ 0, X τ and X 0 τ, 0 the time of ruin, the deficit at ruin and the wealth prior to ruin. 21/ 22
53 Ruin x v u We are interested in E x(e qτ 0 ; X τ 0 du, X τ 0 dv). 22/ 22
Applications of Lévy processes
Applications of Lévy processes Graduate lecture 29 January 2004 Matthias Winkel Departmental lecturer (Institute of Actuaries and Aon lecturer in Statistics) 6. Poisson point processes in fluctuation theory
More informationA Continuity Correction under Jump-Diffusion Models with Applications in Finance
A Continuity Correction under Jump-Diffusion Models with Applications in Finance Cheng-Der Fuh 1, Sheng-Feng Luo 2 and Ju-Fang Yen 3 1 Institute of Statistical Science, Academia Sinica, and Graduate Institute
More informationDividend problem for a general Lévy insurance risk process
Dividend problem for a general Lévy insurance risk process Zbigniew Palmowski Joint work with F. Avram, I. Czarna, A. Kyprianou, M. Pistorius Croatian Quants Day, Zagreb Economic point of view 2 The word
More informationStochastic Dynamical Systems and SDE s. An Informal Introduction
Stochastic Dynamical Systems and SDE s An Informal Introduction Olav Kallenberg Graduate Student Seminar, April 18, 2012 1 / 33 2 / 33 Simple recursion: Deterministic system, discrete time x n+1 = f (x
More informationDrunken Birds, Brownian Motion, and Other Random Fun
Drunken Birds, Brownian Motion, and Other Random Fun Michael Perlmutter Department of Mathematics Purdue University 1 M. Perlmutter(Purdue) Brownian Motion and Martingales Outline Review of Basic Probability
More informationPricing of some exotic options with N IG-Lévy input
Pricing of some exotic options with N IG-Lévy input Sebastian Rasmus, Søren Asmussen 2 and Magnus Wiktorsson Center for Mathematical Sciences, University of Lund, Box 8, 22 00 Lund, Sweden {rasmus,magnusw}@maths.lth.se
More informationAn Introduction to Stochastic Calculus
An Introduction to Stochastic Calculus Haijun Li lih@math.wsu.edu Department of Mathematics Washington State University Week 2-3 Haijun Li An Introduction to Stochastic Calculus Week 2-3 1 / 24 Outline
More informationABSTRACT PROCESS WITH APPLICATIONS TO OPTION PRICING. Department of Finance
ABSTRACT Title of dissertation: THE HUNT VARIANCE GAMMA PROCESS WITH APPLICATIONS TO OPTION PRICING Bryant Angelos, Doctor of Philosophy, 2013 Dissertation directed by: Professor Dilip Madan Department
More informationSmall-time asymptotics of stopped Lévy bridges and simulation schemes with controlled bias
Small-time asymptotics of stopped Lévy bridges and simulation schemes with controlled bias José E. Figueroa-López 1 1 Department of Statistics Purdue University Computational Finance Seminar Purdue University
More informationNon-semimartingales in finance
Non-semimartingales in finance Pricing and Hedging Options with Quadratic Variation Tommi Sottinen University of Vaasa 1st Northern Triangular Seminar 9-11 March 2009, Helsinki University of Technology
More informationChapter 1. Introduction and Preliminaries. 1.1 Motivation. The American put option problem
Chapter 1 Introduction and Preliminaries 1.1 Motivation The American put option problem The valuation of contingent claims has been a widely known topic in the theory of modern finance. Typical claims
More informationPricing Dynamic Solvency Insurance and Investment Fund Protection
Pricing Dynamic Solvency Insurance and Investment Fund Protection Hans U. Gerber and Gérard Pafumi Switzerland Abstract In the first part of the paper the surplus of a company is modelled by a Wiener process.
More informationValuing volatility and variance swaps for a non-gaussian Ornstein-Uhlenbeck stochastic volatility model
Valuing volatility and variance swaps for a non-gaussian Ornstein-Uhlenbeck stochastic volatility model 1(23) Valuing volatility and variance swaps for a non-gaussian Ornstein-Uhlenbeck stochastic volatility
More informationLecture 17. The model is parametrized by the time period, δt, and three fixed constant parameters, v, σ and the riskless rate r.
Lecture 7 Overture to continuous models Before rigorously deriving the acclaimed Black-Scholes pricing formula for the value of a European option, we developed a substantial body of material, in continuous
More informationMATH3075/3975 FINANCIAL MATHEMATICS TUTORIAL PROBLEMS
MATH307/37 FINANCIAL MATHEMATICS TUTORIAL PROBLEMS School of Mathematics and Statistics Semester, 04 Tutorial problems should be used to test your mathematical skills and understanding of the lecture material.
More informationCONTINUOUS TIME PRICING AND TRADING: A REVIEW, WITH SOME EXTRA PIECES
CONTINUOUS TIME PRICING AND TRADING: A REVIEW, WITH SOME EXTRA PIECES THE SOURCE OF A PRICE IS ALWAYS A TRADING STRATEGY SPECIAL CASES WHERE TRADING STRATEGY IS INDEPENDENT OF PROBABILITY MEASURE COMPLETENESS,
More informationUsing Lévy Processes to Model Return Innovations
Using Lévy Processes to Model Return Innovations Liuren Wu Zicklin School of Business, Baruch College Option Pricing Liuren Wu (Baruch) Lévy Processes Option Pricing 1 / 32 Outline 1 Lévy processes 2 Lévy
More informationBROWNIAN MOTION Antonella Basso, Martina Nardon
BROWNIAN MOTION Antonella Basso, Martina Nardon basso@unive.it, mnardon@unive.it Department of Applied Mathematics University Ca Foscari Venice Brownian motion p. 1 Brownian motion Brownian motion plays
More informationM5MF6. Advanced Methods in Derivatives Pricing
Course: Setter: M5MF6 Dr Antoine Jacquier MSc EXAMINATIONS IN MATHEMATICS AND FINANCE DEPARTMENT OF MATHEMATICS April 2016 M5MF6 Advanced Methods in Derivatives Pricing Setter s signature...........................................
More informationStochastic modelling of electricity markets Pricing Forwards and Swaps
Stochastic modelling of electricity markets Pricing Forwards and Swaps Jhonny Gonzalez School of Mathematics The University of Manchester Magical books project August 23, 2012 Clip for this slide Pricing
More informationEvaluation of Credit Value Adjustment with a Random Recovery Rate via a Structural Default Model
Evaluation of Credit Value Adjustment with a Random Recovery Rate via a Structural Default Model Xuemiao Hao and Xinyi Zhu University of Manitoba August 6, 2015 The 50th Actuarial Research Conference University
More informationOption pricing in the stochastic volatility model of Barndorff-Nielsen and Shephard
Option pricing in the stochastic volatility model of Barndorff-Nielsen and Shephard Indifference pricing and the minimal entropy martingale measure Fred Espen Benth Centre of Mathematics for Applications
More informationNormal Inverse Gaussian (NIG) Process
With Applications in Mathematical Finance The Mathematical and Computational Finance Laboratory - Lunch at the Lab March 26, 2009 1 Limitations of Gaussian Driven Processes Background and Definition IG
More informationOptimal stopping problems for a Brownian motion with a disorder on a finite interval
Optimal stopping problems for a Brownian motion with a disorder on a finite interval A. N. Shiryaev M. V. Zhitlukhin arxiv:1212.379v1 [math.st] 15 Dec 212 December 18, 212 Abstract We consider optimal
More informationReplication and Absence of Arbitrage in Non-Semimartingale Models
Replication and Absence of Arbitrage in Non-Semimartingale Models Matematiikan päivät, Tampere, 4-5. January 2006 Tommi Sottinen University of Helsinki 4.1.2006 Outline 1. The classical pricing model:
More informationSADDLEPOINT APPROXIMATIONS TO OPTION PRICES 1. By L. C. G. Rogers and O. Zane University of Bath and First Chicago NBD
The Annals of Applied Probability 1999, Vol. 9, No. 2, 493 53 SADDLEPOINT APPROXIMATIONS TO OPTION PRICES 1 By L. C. G. Rogers and O. Zane University of Bath and First Chicago NBD The use of saddlepoint
More informationTwo hours UNIVERSITY OF MANCHESTER. 23 May :00 16:00. Answer ALL SIX questions The total number of marks in the paper is 90.
Two hours MATH39542 UNIVERSITY OF MANCHESTER RISK THEORY 23 May 2016 14:00 16:00 Answer ALL SIX questions The total number of marks in the paper is 90. University approved calculators may be used 1 of
More informationDividend Problems in Insurance: From de Finetti to Today
Dividend Problems in Insurance: From de Finetti to Today Nicole Bäuerle based on joint works with A. Jaśkiewicz Strasbourg, September 2014 Outline Generic Dividend Problem Motivation Basic Models and Results
More informationAn overview of some financial models using BSDE with enlarged filtrations
An overview of some financial models using BSDE with enlarged filtrations Anne EYRAUD-LOISEL Workshop : Enlargement of Filtrations and Applications to Finance and Insurance May 31st - June 4th, 2010, Jena
More informationUnified Credit-Equity Modeling
Unified Credit-Equity Modeling Rafael Mendoza-Arriaga Based on joint research with: Vadim Linetsky and Peter Carr The University of Texas at Austin McCombs School of Business (IROM) Recent Advancements
More informationCredit Risk using Time Changed Brownian Motions
Credit Risk using Time Changed Brownian Motions Tom Hurd Mathematics and Statistics McMaster University Joint work with Alexey Kuznetsov (New Brunswick) and Zhuowei Zhou (Mac) 2nd Princeton Credit Conference
More informationHedging under Arbitrage
Hedging under Arbitrage Johannes Ruf Columbia University, Department of Statistics Modeling and Managing Financial Risks January 12, 2011 Motivation Given: a frictionless market of stocks with continuous
More informationAMH4 - ADVANCED OPTION PRICING. Contents
AMH4 - ADVANCED OPTION PRICING ANDREW TULLOCH Contents 1. Theory of Option Pricing 2 2. Black-Scholes PDE Method 4 3. Martingale method 4 4. Monte Carlo methods 5 4.1. Method of antithetic variances 5
More informationHedging under arbitrage
Hedging under arbitrage Johannes Ruf Columbia University, Department of Statistics AnStAp10 August 12, 2010 Motivation Usually, there are several trading strategies at one s disposal to obtain a given
More informationLimit Theorems for the Empirical Distribution Function of Scaled Increments of Itô Semimartingales at high frequencies
Limit Theorems for the Empirical Distribution Function of Scaled Increments of Itô Semimartingales at high frequencies George Tauchen Duke University Viktor Todorov Northwestern University 2013 Motivation
More informationStochastic Differential equations as applied to pricing of options
Stochastic Differential equations as applied to pricing of options By Yasin LUT Supevisor:Prof. Tuomo Kauranne December 2010 Introduction Pricing an European call option Conclusion INTRODUCTION A stochastic
More informationCRRAO Advanced Institute of Mathematics, Statistics and Computer Science (AIMSCS) Research Report. B. L. S. Prakasa Rao
CRRAO Advanced Institute of Mathematics, Statistics and Computer Science (AIMSCS) Research Report Author (s): B. L. S. Prakasa Rao Title of the Report: Option pricing for processes driven by mixed fractional
More informationAre stylized facts irrelevant in option-pricing?
Are stylized facts irrelevant in option-pricing? Kyiv, June 19-23, 2006 Tommi Sottinen, University of Helsinki Based on a joint work No-arbitrage pricing beyond semimartingales with C. Bender, Weierstrass
More informationThe Birth of Financial Bubbles
The Birth of Financial Bubbles Philip Protter, Cornell University Finance and Related Mathematical Statistics Issues Kyoto Based on work with R. Jarrow and K. Shimbo September 3-6, 2008 Famous bubbles
More informationOptimal Option Pricing via Esscher Transforms with the Meixner Process
Communications in Mathematical Finance, vol. 2, no. 2, 2013, 1-21 ISSN: 2241-1968 (print), 2241 195X (online) Scienpress Ltd, 2013 Optimal Option Pricing via Esscher Transforms with the Meixner Process
More informationPricing theory of financial derivatives
Pricing theory of financial derivatives One-period securities model S denotes the price process {S(t) : t = 0, 1}, where S(t) = (S 1 (t) S 2 (t) S M (t)). Here, M is the number of securities. At t = 1,
More informationTime-changed Brownian motion and option pricing
Time-changed Brownian motion and option pricing Peter Hieber Chair of Mathematical Finance, TU Munich 6th AMaMeF Warsaw, June 13th 2013 Partially joint with Marcos Escobar (RU Toronto), Matthias Scherer
More informationOrnstein-Uhlenbeck Theory
Beatrice Byukusenge Department of Technomathematics Lappeenranta University of technology January 31, 2012 Definition of a stochastic process Let (Ω,F,P) be a probability space. A stochastic process is
More informationS t d with probability (1 p), where
Stochastic Calculus Week 3 Topics: Towards Black-Scholes Stochastic Processes Brownian Motion Conditional Expectations Continuous-time Martingales Towards Black Scholes Suppose again that S t+δt equals
More informationBandit Problems with Lévy Payoff Processes
Bandit Problems with Lévy Payoff Processes Eilon Solan Tel Aviv University Joint with Asaf Cohen Multi-Arm Bandits A single player sequential decision making problem. Time is continuous or discrete. The
More informationPricing Exotic Options Under a Higher-order Hidden Markov Model
Pricing Exotic Options Under a Higher-order Hidden Markov Model Wai-Ki Ching Tak-Kuen Siu Li-min Li 26 Jan. 2007 Abstract In this paper, we consider the pricing of exotic options when the price dynamic
More informationJump-type Lévy processes
Jump-type Lévy processes Ernst Eberlein Department of Mathematical Stochastics, University of Freiburg, Eckerstr. 1, 7914 Freiburg, Germany, eberlein@stochastik.uni-freiburg.de 1 Probabilistic structure
More informationEfficient Static Replication of European Options under Exponential Lévy Models
CIRJE-F-539 Efficient Static Replication of European Options under Exponential Lévy Models Akihiko Takahashi University of Tokyo Akira Yamazaki Mizuho-DL Financial Technology Co., Ltd. January 8 CIRJE
More informationConditional Density Method in the Computation of the Delta with Application to Power Market
Conditional Density Method in the Computation of the Delta with Application to Power Market Asma Khedher Centre of Mathematics for Applications Department of Mathematics University of Oslo A joint work
More informationA GENERAL FORMULA FOR OPTION PRICES IN A STOCHASTIC VOLATILITY MODEL. Stephen Chin and Daniel Dufresne. Centre for Actuarial Studies
A GENERAL FORMULA FOR OPTION PRICES IN A STOCHASTIC VOLATILITY MODEL Stephen Chin and Daniel Dufresne Centre for Actuarial Studies University of Melbourne Paper: http://mercury.ecom.unimelb.edu.au/site/actwww/wps2009/no181.pdf
More information1.1 Basic Financial Derivatives: Forward Contracts and Options
Chapter 1 Preliminaries 1.1 Basic Financial Derivatives: Forward Contracts and Options A derivative is a financial instrument whose value depends on the values of other, more basic underlying variables
More informationExtended Libor Models and Their Calibration
Extended Libor Models and Their Calibration Denis Belomestny Weierstraß Institute Berlin Vienna, 16 November 2007 Denis Belomestny (WIAS) Extended Libor Models and Their Calibration Vienna, 16 November
More informationLecture Note 8 of Bus 41202, Spring 2017: Stochastic Diffusion Equation & Option Pricing
Lecture Note 8 of Bus 41202, Spring 2017: Stochastic Diffusion Equation & Option Pricing We shall go over this note quickly due to time constraints. Key concept: Ito s lemma Stock Options: A contract giving
More informationLévy Processes. Antonis Papapantoleon. TU Berlin. Computational Methods in Finance MSc course, NTUA, Winter semester 2011/2012
Lévy Processes Antonis Papapantoleon TU Berlin Computational Methods in Finance MSc course, NTUA, Winter semester 2011/2012 Antonis Papapantoleon (TU Berlin) Lévy processes 1 / 41 Overview of the course
More informationSTOCHASTIC INTEGRALS
Stat 391/FinMath 346 Lecture 8 STOCHASTIC INTEGRALS X t = CONTINUOUS PROCESS θ t = PORTFOLIO: #X t HELD AT t { St : STOCK PRICE M t : MG W t : BROWNIAN MOTION DISCRETE TIME: = t < t 1
More informationMASM006 UNIVERSITY OF EXETER SCHOOL OF ENGINEERING, COMPUTER SCIENCE AND MATHEMATICS MATHEMATICAL SCIENCES FINANCIAL MATHEMATICS.
MASM006 UNIVERSITY OF EXETER SCHOOL OF ENGINEERING, COMPUTER SCIENCE AND MATHEMATICS MATHEMATICAL SCIENCES FINANCIAL MATHEMATICS May/June 2006 Time allowed: 2 HOURS. Examiner: Dr N.P. Byott This is a CLOSED
More informationIntroduction to Stochastic Calculus With Applications
Introduction to Stochastic Calculus With Applications Fima C Klebaner University of Melbourne \ Imperial College Press Contents Preliminaries From Calculus 1 1.1 Continuous and Differentiable Functions.
More informationLecture 15: Exotic Options: Barriers
Lecture 15: Exotic Options: Barriers Dr. Hanqing Jin Mathematical Institute University of Oxford Lecture 15: Exotic Options: Barriers p. 1/10 Barrier features For any options with payoff ξ at exercise
More informationHedging Credit Derivatives in Intensity Based Models
Hedging Credit Derivatives in Intensity Based Models PETER CARR Head of Quantitative Financial Research, Bloomberg LP, New York Director of the Masters Program in Math Finance, Courant Institute, NYU Stanford
More informationMathematics of Finance Final Preparation December 19. To be thoroughly prepared for the final exam, you should
Mathematics of Finance Final Preparation December 19 To be thoroughly prepared for the final exam, you should 1. know how to do the homework problems. 2. be able to provide (correct and complete!) definitions
More informationOptimal trading strategies under arbitrage
Optimal trading strategies under arbitrage Johannes Ruf Columbia University, Department of Statistics The Third Western Conference in Mathematical Finance November 14, 2009 How should an investor trade
More informationRisk-Neutral Valuation
N.H. Bingham and Rüdiger Kiesel Risk-Neutral Valuation Pricing and Hedging of Financial Derivatives W) Springer Contents 1. Derivative Background 1 1.1 Financial Markets and Instruments 2 1.1.1 Derivative
More informationOptimal Hedging of Variance Derivatives. John Crosby. Centre for Economic and Financial Studies, Department of Economics, Glasgow University
Optimal Hedging of Variance Derivatives John Crosby Centre for Economic and Financial Studies, Department of Economics, Glasgow University Presentation at Baruch College, in New York, 16th November 2010
More informationChapter 15: Jump Processes and Incomplete Markets. 1 Jumps as One Explanation of Incomplete Markets
Chapter 5: Jump Processes and Incomplete Markets Jumps as One Explanation of Incomplete Markets It is easy to argue that Brownian motion paths cannot model actual stock price movements properly in reality,
More informationQuadratic hedging in affine stochastic volatility models
Quadratic hedging in affine stochastic volatility models Jan Kallsen TU München Pittsburgh, February 20, 2006 (based on joint work with F. Hubalek, L. Krawczyk, A. Pauwels) 1 Hedging problem S t = S 0
More informationInsider information and arbitrage profits via enlargements of filtrations
Insider information and arbitrage profits via enlargements of filtrations Claudio Fontana Laboratoire de Probabilités et Modèles Aléatoires Université Paris Diderot XVI Workshop on Quantitative Finance
More information1 IEOR 4701: Notes on Brownian Motion
Copyright c 26 by Karl Sigman IEOR 47: Notes on Brownian Motion We present an introduction to Brownian motion, an important continuous-time stochastic process that serves as a continuous-time analog to
More informationLIBOR models, multi-curve extensions, and the pricing of callable structured derivatives
Weierstrass Institute for Applied Analysis and Stochastics LIBOR models, multi-curve extensions, and the pricing of callable structured derivatives John Schoenmakers 9th Summer School in Mathematical Finance
More informationFinancial and Actuarial Mathematics
Financial and Actuarial Mathematics Syllabus for a Master Course Leda Minkova Faculty of Mathematics and Informatics, Sofia University St. Kl.Ohridski leda@fmi.uni-sofia.bg Slobodanka Jankovic Faculty
More informationLarge Deviations and Stochastic Volatility with Jumps: Asymptotic Implied Volatility for Affine Models
Large Deviations and Stochastic Volatility with Jumps: TU Berlin with A. Jaquier and A. Mijatović (Imperial College London) SIAM conference on Financial Mathematics, Minneapolis, MN July 10, 2012 Implied
More informationBrownian Motion. Richard Lockhart. Simon Fraser University. STAT 870 Summer 2011
Brownian Motion Richard Lockhart Simon Fraser University STAT 870 Summer 2011 Richard Lockhart (Simon Fraser University) Brownian Motion STAT 870 Summer 2011 1 / 33 Purposes of Today s Lecture Describe
More informationSkewness in Lévy Markets
Skewness in Lévy Markets Ernesto Mordecki Universidad de la República, Montevideo, Uruguay Lecture IV. PASI - Guanajuato - June 2010 1 1 Joint work with José Fajardo Barbachan Outline Aim of the talk Understand
More informationDrawdowns, Drawups, their joint distributions, detection and financial risk management
Drawdowns, Drawups, their joint distributions, detection and financial risk management June 2, 2010 The cases a = b The cases a > b The cases a < b Insuring against drawing down before drawing up Robust
More informationExact Sampling of Jump-Diffusion Processes
1 Exact Sampling of Jump-Diffusion Processes and Dmitry Smelov Management Science & Engineering Stanford University Exact Sampling of Jump-Diffusion Processes 2 Jump-Diffusion Processes Ubiquitous in finance
More informationFrom Discrete Time to Continuous Time Modeling
From Discrete Time to Continuous Time Modeling Prof. S. Jaimungal, Department of Statistics, University of Toronto 2004 Arrow-Debreu Securities 2004 Prof. S. Jaimungal 2 Consider a simple one-period economy
More informationExtended Libor Models and Their Calibration
Extended Libor Models and Their Calibration Denis Belomestny Weierstraß Institute Berlin Haindorf, 7 Februar 2008 Denis Belomestny (WIAS) Extended Libor Models and Their Calibration Haindorf, 7 Februar
More information2.1 Random variable, density function, enumerative density function and distribution function
Risk Theory I Prof. Dr. Christian Hipp Chair for Science of Insurance, University of Karlsruhe (TH Karlsruhe) Contents 1 Introduction 1.1 Overview on the insurance industry 1.1.1 Insurance in Benin 1.1.2
More informationHedging with Life and General Insurance Products
Hedging with Life and General Insurance Products June 2016 2 Hedging with Life and General Insurance Products Jungmin Choi Department of Mathematics East Carolina University Abstract In this study, a hybrid
More informationHedging Under Jump Diffusions with Transaction Costs. Peter Forsyth, Shannon Kennedy, Ken Vetzal University of Waterloo
Hedging Under Jump Diffusions with Transaction Costs Peter Forsyth, Shannon Kennedy, Ken Vetzal University of Waterloo Computational Finance Workshop, Shanghai, July 4, 2008 Overview Overview Single factor
More informationApplications of short-time asymptotics to the statistical estimation and option pricing of Lévy-driven models
Applications of short-time asymptotics to the statistical estimation and option pricing of Lévy-driven models José Enrique Figueroa-López 1 1 Department of Statistics Purdue University CIMAT and Universidad
More informationHow do Variance Swaps Shape the Smile?
How do Variance Swaps Shape the Smile? A Summary of Arbitrage Restrictions and Smile Asymptotics Vimal Raval Imperial College London & UBS Investment Bank www2.imperial.ac.uk/ vr402 Joint Work with Mark
More informationSato Processes in Finance
Sato Processes in Finance Dilip B. Madan Robert H. Smith School of Business Slovenia Summer School August 22-25 2011 Lbuljana, Slovenia OUTLINE 1. The impossibility of Lévy processes for the surface of
More informationLévy models in finance
Lévy models in finance Ernesto Mordecki Universidad de la República, Montevideo, Uruguay PASI - Guanajuato - June 2010 Summary General aim: describe jummp modelling in finace through some relevant issues.
More informationLecture 3: Review of mathematical finance and derivative pricing models
Lecture 3: Review of mathematical finance and derivative pricing models Xiaoguang Wang STAT 598W January 21th, 2014 (STAT 598W) Lecture 3 1 / 51 Outline 1 Some model independent definitions and principals
More informationTangent Lévy Models. Sergey Nadtochiy (joint work with René Carmona) Oxford-Man Institute of Quantitative Finance University of Oxford.
Tangent Lévy Models Sergey Nadtochiy (joint work with René Carmona) Oxford-Man Institute of Quantitative Finance University of Oxford June 24, 2010 6th World Congress of the Bachelier Finance Society Sergey
More informationLecture 4. Finite difference and finite element methods
Finite difference and finite element methods Lecture 4 Outline Black-Scholes equation From expectation to PDE Goal: compute the value of European option with payoff g which is the conditional expectation
More informationSTOCHASTIC CALCULUS AND BLACK-SCHOLES MODEL
STOCHASTIC CALCULUS AND BLACK-SCHOLES MODEL YOUNGGEUN YOO Abstract. Ito s lemma is often used in Ito calculus to find the differentials of a stochastic process that depends on time. This paper will introduce
More informationBeyond the Black-Scholes-Merton model
Econophysics Lecture Leiden, November 5, 2009 Overview 1 Limitations of the Black-Scholes model 2 3 4 Limitations of the Black-Scholes model Black-Scholes model Good news: it is a nice, well-behaved model
More informationApproximating a life table by linear combinations of exponential distributions and valuing life-contingent options
Approximating a life table by linear combinations of exponential distributions and valuing life-contingent options Zhenhao Zhou Department of Statistics and Actuarial Science The University of Iowa Iowa
More informationUSC Math. Finance April 22, Path-dependent Option Valuation under Jump-diffusion Processes. Alan L. Lewis
USC Math. Finance April 22, 23 Path-dependent Option Valuation under Jump-diffusion Processes Alan L. Lewis These overheads to be posted at www.optioncity.net (Publications) Topics Why jump-diffusion models?
More informationPortfolio Optimization Under Fixed Transaction Costs
Portfolio Optimization Under Fixed Transaction Costs Gennady Shaikhet supervised by Dr. Gady Zohar The model Market with two securities: b(t) - bond without interest rate p(t) - stock, an Ito process db(t)
More informationis a standard Brownian motion.
Stochastic Calculus Final Examination Solutions June 7, 25 There are 2 problems and points each.. (Property of Brownian Bridge) Let Bt = {B t, t B = } be a Brownian bridge, and define dx t = Xt dt + db
More informationInsurance against Market Crashes
Insurance against Market Crashes Hongzhong Zhang a Tim Leung a Olympia Hadjiliadis b a Columbia University b The City University of New York June 29, 2012 H. Zhang, T. Leung, O. Hadjiliadis (Columbia Insurance
More informationFinancial Engineering. Craig Pirrong Spring, 2006
Financial Engineering Craig Pirrong Spring, 2006 March 8, 2006 1 Levy Processes Geometric Brownian Motion is very tractible, and captures some salient features of speculative price dynamics, but it is
More informationIEOR E4703: Monte-Carlo Simulation
IEOR E4703: Monte-Carlo Simulation Simulating Stochastic Differential Equations Martin Haugh Department of Industrial Engineering and Operations Research Columbia University Email: martin.b.haugh@gmail.com
More information1 Mathematics in a Pill 1.1 PROBABILITY SPACE AND RANDOM VARIABLES. A probability triple P consists of the following components:
1 Mathematics in a Pill The purpose of this chapter is to give a brief outline of the probability theory underlying the mathematics inside the book, and to introduce necessary notation and conventions
More informationOptimal Investment for Worst-Case Crash Scenarios
Optimal Investment for Worst-Case Crash Scenarios A Martingale Approach Frank Thomas Seifried Department of Mathematics, University of Kaiserslautern June 23, 2010 (Bachelier 2010) Worst-Case Portfolio
More informationBasic Stochastic Processes
Basic Stochastic Processes Series Editor Jacques Janssen Basic Stochastic Processes Pierre Devolder Jacques Janssen Raimondo Manca First published 015 in Great Britain and the United States by ISTE Ltd
More informationParameters Estimation in Stochastic Process Model
Parameters Estimation in Stochastic Process Model A Quasi-Likelihood Approach Ziliang Li University of Maryland, College Park GEE RIT, Spring 28 Outline 1 Model Review The Big Model in Mind: Signal + Noise
More informationRisk, Return, and Ross Recovery
Risk, Return, and Ross Recovery Peter Carr and Jiming Yu Courant Institute, New York University September 13, 2012 Carr/Yu (NYU Courant) Risk, Return, and Ross Recovery September 13, 2012 1 / 30 P, Q,
More information