The Costs of Implementing a Unilateral One-Sided Exchange Rate Target Zone

Markus Hertrich

Review of Economics, 2016, vol. 67, issue 1, 91-120

Abstract: In the aftermath of the recent financial crisis, the central banks of small open economies such as the Swiss National Bank (SNB) implemented a unilateral one-sided exchange rate target zone vis-à-vis the euro currency to counteract deflationary pressures. Recently, the SNB abandoned its minimum exchange rate regime, arguing that after having analyzed the costs and benefits of this non-standard exchange rate policy measure, it was no longer sustainable. This paper proposes a model that allows central banks and policymakers to estimate ex-ante the costs of implementing and maintaining a unilateral one-sided target zone (in terms of the expected size of foreign-exchange interventions) and to monitor these costs during the period in which it is enforced. The model also offers central banks a tool to identify the right timing for the discontinuation of a minimum exchange rate regime. An empirical application to the Swiss case shows the ex-ante estimated size of these costs and reveals that these costs might have been substantial without the abandonment of the minimum exchange rate regime, which accords with the official statements of the SNB.

Keywords: foreign-exchange interventions; foreign exchange reserves; minimum exchange rate; reflected geometric Brownian motion; target zone costs; Swiss National Bank (search for similar items in EconPapers)
JEL-codes: E42 E52 E58 E63 F33 F45 (search for similar items in EconPapers)
Date: 2016
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Working Paper: The Costs of Implementing a Unilateral One-Sided Exchange Rate Target Zone (2015)
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DOI: 10.1515/roe-2015-1006

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