Arbitrage Theory in Continuous Time

Arbitrage Theory in Continuous Time

Arbitrage Theory in Continuous Time

Arbitrage Theory in Continuous Time


Combining sound mathematical principles with the necessary economic focus, Arbitrage Theory in Continuous Time is specifically designed for graduate students, and includes solved examples for every new technique presented, numerous exercises, and recommended reading lists for each chapter.


The purpose of this book is to present arbitrage theory and its applications to pricing problems for financial derivatives. It is intended as a textbook for graduate and advanced undergraduate students in finance, economics, mathematics, and statistics and I also hope that it will be useful for practitioners.

Because of its intended audience, the book does not presuppose any previous knowledge of abstract measure theory. the only mathematical prerequisites are advanced calculus and a basic course in probability theory. No previous knowledge in economics or finance is assumed.

The book starts by contradicting its own title, in the sense that the second chapter is devoted to the binomial model. After that, the theory is exclusively developed in continuous time.

The main mathematical tool used in the book is the theory of stochastic differential equations (SDEs), and instead of going into the technical details concerning the foundations of that theory I have focused on applications. the object is to give the reader, as quickly and painlessly as possible, a solid working knowledge of the powerful mathematical tool known as Itô calculus. We treat basic sde techniques, including Feynman-Kač representations and the Kolmogorov equations. Martingales are introduced at an early stage. Throughout the book there is a strong emphasis on concrete computations, and the exercises at the end of each chapter constitute an integral part of the text.

The mathematics developed in the first part of the book is then applied to arbitrage pricing of financial derivatives. We cover the basic Black-Scholes theory, including delta hedging and "the greeks", and we extend it to the case of several underlying assets (including stochastic interest rates) as well as to dividend paying assets. Barrier options, as well as currency and quanto products, are given separate chapters. We also consider, in some detail, incomplete markets.

American contracts are treated only in passing. the reason for this is that the theory is complicated and that few analytical results are available. Instead I have included a chapter on stochastic optimal control and its applications to optimal portfolio selection.

Interest rate theory constitutes a large part of the book, and we cover the basic short rate theory, including inversion of the yield curve and affine term structures. the Heath-Jarrow-Morton theory is treated, both under the objective measure and under a martingale measure, and we also present the Musiela parametrization. the basic framework for most chapters is that of a multifactor model, and this allows us, despite the fact that we do not formally use measure theory, to give a fairly complete treatment of the general change of numeraire . . .

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