The long rate R and the short rate r are known to have a jointly normal distribution
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The long rate R and the short rate r are known to have a jointly normal distribution with variance-covariance matrix ? and mean ?. These moments are given by
Let the corresponding joint density be denoted by f (R,r).
(a) Using Mathematica or Maple plot this joint density.
(b) Find a function ?(R,r) such that the interest rates have zero mean under the probability:
dp =??(R,r)f(R,r)dRdr.
(c) Plot ?(R,r) and the new density.
(d) Has the variance-covariance matrix of interest rate vector changed?
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Related Book For
An Introduction to the Mathematics of financial Derivatives
ISBN: 978-0123846822
2nd Edition
Authors: Salih N. Neftci
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