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Testing Continuous-Time Models of the Spot Interest Rate

  • Yacine Ait-Sahalia

Different continuous-time models for interest rates coexist in the literature. We test parametric models by comparing their implied parametric density to the same density estimated nonparametrically. We do not replace the continuous-time model by discrete approximations, even though the data are recorded at discrete intervals. The principal source of rejection of existing models is the strong nonlinearity of the drift. Around its mean, where the drift is essentially zero, the spot rate behaves like a random walk. The drift then mean-reverts strongly when far away from the mean. The volatility is higher when away from the mean.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 5346.

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Date of creation: Nov 1995
Date of revision:
Publication status: published as Review of Financial Studies, Vol. 9, no. 2 (Spring 1996): 385-426.
Handle: RePEc:nbr:nberwo:5346
Note: AP
Contact details of provider: Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.
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