Foreign Exchange Intervention Rules For Central Banks A Risk Based Framework

This paper presents a rule for foreign exchange interventions (FXI), designed to preserve financial stability in floating exchange rate arrangements. The FXI rule addresses a market failure: the absence of hedging solution for tail exchange rate risk in the market (i.e. high volatility). Market impairment or overshoot of exchange rate between two equilibria could generate high volatility and threaten financial stability due to unhedged exposure to exchange rate risk in the economy. The rule uses the concept of Value at Risk (VaR) to define FXI triggers. While it provides to the market a hedge against tail risk, the rule allows the exchange rate to smoothly adjust to new equilibria. In addition, the rule is budget neutral over the medium term, encourages a prudent risk management in the market, and is more resilient to speculative attacks than other rules, such as fixed-volatility rules. The empirical methodology is backtested on Banco Mexico’s FXIs data between 2008 and 2016.

Staff Discussion Notes showcase the latest policy-related analysis and research being developed by individual IMF staff and are published to elicit comment and to further debate. These papers are generally brief and written in nontechnical language, and so are aimed at a broad audience interested in economic policy issues. This Web-only series replaced Staff Position Notes in January 2011.

The paper is about the art of exchange rate management by central banks. It begins by reviewing the diversity of objectives and practices of central bank intervention in the foreign exchange market. Central banks typically exercise discretion in determining when and to what extent to intervene. Some central banks use publicly declared rules of intervention, with the aim of increasing visibility and strengthening the signaling channel of policy. There is tentative evidence that the volatility of foreign exchange reserves is comparatively lower in emerging market economies where central banks follow some form of rules-based foreign exchange intervention. The paper goes on to argue that when the foreign exchange market includes some large strategic participants, the central bank can achieve superior outcomes if intervention takes the form of a rule, or "schedule, " indicating commitments to buying and selling different quantities of foreign currency conditional on the exchange rate. Exchange rate management and reserve management can then be treated as two independent objectives by the central bank. In line with the stylized facts reviewed, this would enable a central bank to pursue exchange rate objectives with minimum reserve changes, or achieve reserve targets with minimum impact on the exchange rate.

This is the 64th issue of the AREAER. It provides a description of the foreign exchange arrangements, exchange and trade systems, and capital controls of all IMF member countries. It also provides information on the operation of foreign exchange markets and controls on international trade. It describes controls on capital transactions and measures implemented in the financial sector, including prudential measures. In addition, it reports on exchange measures imposed by member countries for security reasons. A single table provides a snapshot of the exchange and trade systems of all IMF member countries. The Overview describes in detail how the general trend toward foreign exchange liberalization continued during 2012, alongside a strengthening of the financial sector regulatory framework. The AREAER is available in several formats. The Overview in print and online, and the detailed information for each of the 191 member countries and territories is included on a CD that accompanies the printed Overview and in an online database, AREAER Online. In addition to the information on the exchange and trade system of IMF member countries in 2012, AREAER Online contains historical data published in previous issues of the AREAER. It is searchable by year, country, and category of measure and allows cross country comparisons for time series.

What is the case for adding the unconventional balance sheet policies used by major central banks since 2007 to the standard policy toolkit? The record so far suggests that the new liquidity providing policies in support of financial stability generally warrant inclusion. As the balance sheet policies aimed at macroeconomic stability were used only by a small number of highly credible central banks facing a lower bound constraint on conventional interest rate policy, they are not relevant for most central banks or states of the world. Best practices of these policies are documented in this paper.

The Annual Report on Exchange Arrangements and Exchange Restrictions has been published by the IMF since 1950. It draws on information available to the IMF from a number of sources, including that provided in the course of official staff visits to member countries, and has been prepared in close consultation with national authorities.