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Target Zones and Interest Rate Variability

  • Svensson, Lars E O

The trade-off between interest rate variability and the width of an exchange rate target zone is examined, using the regulated Brownian motion model of target zones. It is shown that for narrow exchange rate bands, and for reasonable parameter values, the interest rate differential's asymptotic variability is increasing in the width of the exchange rate band; whereas for wide exchange rate bands it is slowly decreasing in this width. The interest rate differential's instantaneous variability is decreasing in the width of the exchange rate band. A narrow target zone differs from a completely fixed exchange rate regime in that the interest rate differential's instantaneous standard deviation is high and even increases when the zone narrows. The model is extended to include a realignment / devaluation risk, as well as an endogenous exchange rate risk premium. The risk premium is small for reasonable parameter values and does not matter much.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 372.

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Date of creation: Feb 1990
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Handle: RePEc:cpr:ceprdp:372
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  1. Flood, Robert P & Garber, Peter M, 1991. "The Linkage between Speculative Attack and Target Zone Models of Exchange Rates," The Quarterly Journal of Economics, MIT Press, vol. 106(4), pages 1367-72, November.
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  15. Frankel, Jeffrey A., 1982. "In search of the exchange risk premium: A six-currency test assuming mean-variance optimization," Journal of International Money and Finance, Elsevier, vol. 1(1), pages 255-274, January.
  16. Miller, Marcus & Weller, Paul, 1989. "Exchange Rate Bands and Realignments in a Stationary Stochastic Setting," CEPR Discussion Papers 299, C.E.P.R. Discussion Papers.
  17. Bernard Dumas, . "Super Contact and Related Optimality Conditions: A Supplement to Avinash Dixit's: "A Simplified Exposition of Some Results Concerning Regulated Brownian Motion" (Reprint 020)," Rodney L. White Center for Financial Research Working Papers 43-88, Wharton School Rodney L. White Center for Financial Research.
  18. Lars Hörngren & Anders Vredin, 1989. "Exchange risk premia in a currency basket system," Review of World Economics (Weltwirtschaftliches Archiv), Springer, vol. 125(2), pages 311-325, June.
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