Exact lower bounds on the exponential moments of truncated random variables

Document Type

Article

Publication Date

6-1-2011

Abstract

Exact lower bounds on the exponential moments of min(y,X) and X 1{X < y } are provided given the first two moments of a random variable X. These bounds are useful in work on large deviation probabilities and nonuniform Berry-Esseen bounds, when the Cramér tilt transform may be employed. Asymptotic properties of these lower bounds are presented. Comparative advantages of the so-called Winsorization min(y,X) over the truncation X 1{X < y} are demonstrated. An application to option pricing is given. © Applied Probability Trust 2011.

Publication Title

Journal of Applied Probability

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