Read e-book online Applied Stochastic Control of Jump Diffusions (2nd Edition) PDF

By Bernt Øksendal, Agnès Sulem

ISBN-10: 3540698264

ISBN-13: 9783540698265

The most function of the publication is to offer a rigorous, but normally nontechnical, creation to an important and worthwhile resolution tools of varied varieties of stochastic regulate difficulties for leap diffusions and its applications.

The kinds of keep watch over difficulties lined contain classical stochastic keep watch over, optimum preventing, impulse keep watch over and singular keep watch over. either the dynamic programming procedure and the utmost precept approach are mentioned, in addition to the relation among them. Corresponding verification theorems regarding the Hamilton-Jacobi Bellman equation and/or (quasi-)variational inequalities are formulated. There also are chapters at the viscosity answer formula and numerical methods.

The textual content emphasises functions, in most cases to finance. all of the major effects are illustrated through examples and workouts look on the finish of every bankruptcy with whole suggestions. this may support the reader comprehend the idea and notice how you can practice it.

The e-book assumes a few easy wisdom of stochastic research, degree conception and partial differential equations.

In the 2d version there's a new bankruptcy on optimum keep watch over of stochastic partial differential equations pushed through Lévy techniques. there's additionally a brand new part on optimum preventing with behind schedule info. furthermore, corrections and different advancements were made.

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Read Online or Download Applied Stochastic Control of Jump Diffusions (2nd Edition) (Universitext) PDF

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Extra info for Applied Stochastic Control of Jump Diffusions (2nd Edition) (Universitext)

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Suppose the price X(t) at time t of an asset (a property, a stock. . s. ν. 1) If we sell the asset at time s + τ we get the expected discounted net payoff J τ (s, x) := E s,x e−ρ(s+τ ) (X(τ ) − a)X{τ <∞} , where ρ > 0 (the discounting exponent) and a > 0 (the transaction cost) are constants. 2) Φ(s, x) = sup J τ (s, x) = J τ (s, x). 2 to solve this problem as follows: Put S = R × (0, ∞) and s+t Y (t) = , t ≥ 0. X(t) Then ⎡ 1 ⎤ ⎡ 0 ⎦dt +⎣ dY (t) = ⎣ αX(t) βX(t) ⎤ ⎡ ⎢ ⎦dB(t) +⎢ ⎣ ⎤ ⎡ ⎤ s ⎥ ⎥, Y (0) = ⎣ ⎦ ⎦ z N (dt, dz) x 0 γX(t− ) R and the generator A of Y (t) is Aφ(s, x) = ∂φ ∂φ 1 2 2 ∂ 2 φ + αx + β x ∂s ∂x 2 ∂x2 + R φ(s, x + γxz) − φ(s, x) − γxz ∂φ ∂x ν(dz).

4) The corresponding wealth process V φ (t) is defined by V φ (t) = φ0 (t)S0 (t) + φ1 (t)S1 (t), 0 ≤ t ≤ T. 6 Exercises 21 We say that (φ0 , φ1 ) is self-financing if V φ (t) is also given by t V φ (t) = V φ (0) + t φ0 (s)dS0 (s) + 0 If, in addition, V φ (t) φ1 (s)dS1 (s). 7) we say that φ is admissible and write φ ∈ A0 . A portfolio φ ∈ A0 is called an arbitrage if V φ (0) = 0, V φ (T ) ≥ 0, and P [V φ (T ) > 0] > 0. 8) Does this market have an arbitrage? 6) to get φ0 (t) = e−rt (V φ (t) − φ1 (t)S1 (t)) and dV φ (t) = rV φ (t)dt + φ1 (t)S1 (t− ) (μ − r)dt + γ z N (dt, dz) .

5) and hence φ(y) = J (ˆu) (y) ≤ Φ(y) for all y ∈ S. 4). 2 (Optimal Consumption and Portfolio in a L´ evy Type Black–Scholes Market [Aa, FØS1]). Suppose we have a market with two possible investments: (i) A safe investment (bond, bank account) with price dynamics dP1 (t) = rP1 (t)dt, P1 (0) = p1 > 0. (ii) A risky investment (stock) with price dynamics dP2 (t) = P2 (t− ) μ dt + σ dB(t) + ∞ z N (dt, dz) , −1 P2 (0) = p2 > 0, where r > 0, μ > 0, and σ ∈ R are constants. We assume that ∞ −1 |z|dν(z) < ∞ and μ > r.

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Applied Stochastic Control of Jump Diffusions (2nd Edition) (Universitext) by Bernt Øksendal, Agnès Sulem

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