The Itô Formula

Eckhard Platen () and David Heath ()
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Eckhard Platen: University of Technology
David Heath: Australian National University

Chapter 6 in A Benchmark Approach to Quantitative Finance, 2006, pp 205-235 from Springer

Abstract: Abstract The price of a security, for instance, a zero coupon bond which generates some future payoff at a maturity date, is often dependent on the value of an underlying process. In many applications, the effect of changes in the underlying process on this price needs to be quantified. In deterministic calculus this type of problem is handled by the chain rule. In stochastic calculus the corresponding generalization of the chain rule is given by the Itô formula. This stochastic chain rule contains terms reflecting the effect due to the stochastic processes involved having non-zero quadratic variation. In this chapter we introduce, apply and derive the Itô formula. It is widely regarded as the main tool in stochastic calculus and is therefore highly important in quantitative finance.

Date: 2006
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DOI: 10.1007/978-3-540-47856-0_6

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