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We introduce new measures of immunization such as exponential duration referring, in particular, to Fong and Vasi.ek [7], Nawalkha and Chambers [14], Balbas and Ibanez [2], and Balbas et al. [3], but under the assumption of multiple shocks in the term structure of interest rates. These shocks are given by a random field. The cases of a single and multiple liabilities are discussed separately.
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