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.

Despite increasing exchange rate flexibility, central banks in emerging markets still intervene in their foreign exchange markets for several reasons. In doing so, they face many operational questions, including on the degree of transparency and the choice of markets and counterparties. This paper identifies elements of best practice in official foreign exchange intervention, presents survey evidence on intervention practices in developing countries, and assesses the effectiveness of intervention in Mexico and Turkey.

This paper offers guidance on the operational aspects of official intervention in the foreign exchange market, particularly in developing countries with flexible exchange rate regimes. A brief survey of the literature and country experience is followed by an analysis of the objectives, timing, amount, degree of transparency, and choice of markets and counterparties in conducting intervention. The analysis highlights the difficulty of detecting exchange rate misalignments and disorderly markets, and argues in favor of parsimony in official intervention. Determining the timing and amount of intervention is a highly subjective excercise, and some degree of discretion is almost necessary, though policy rules may serve as "rules of thumb."

This paper aims to identify appropriate option contract specifications for effective central bank exchange market intervention. Option contract specifications determine the impact of options on the underlying asset or currency, and hence their actual effect on asset price or currency volatility and are therefore key to determining the effectiveness of option-based intervention. The paper reviews the experience of the systematic option-based foreign exchange market intervention of the Central Bank of Colombia and finds that its contract has only been moderately successful at abating exchange rate volatility, which is attributed here to sub-optimal contract specifications.

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 book explains why central banks continue to carry out foreign exchange interventions despite their poor track record. It uses confidential daily intervention data from the Bundesbank and the Federal Reserve.

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.

Over the past two decades, many low- and lower-middle income countries (LLMICs) have improved control over fiscal policy, liberalized and deepened financial markets, and stabilized inflation at moderate levels. Monetary policy frameworks that have helped achieve these ends are being challenged by continued financial development and increased exposure to global capital markets. Many policymakers aspire to move beyond the basics of stability to implement monetary policy frameworks that better anchor inflation and promote macroeconomic stability and growth. Many of these LLMICs are thus considering and implementing improvements to their monetary policy frameworks. The recent successes of some LLMICs and the experiences of emerging and advanced economies, both early in their policy modernization process and following the global financial crisis, are valuable in identifying desirable features of such frameworks. This paper draws on those lessons to provide guidance on key elements of effective monetary policy frameworks for LLMICs.

We investigate the motives inflation-targeting central banks in emerging markets may have for intervening in foreign exchange markets and evaluate the case for such interventions based on the existing literature. Our findings suggest that the rationale for interventions depends on initial conditions and country-specific circumstances. The case is strongest in the presence of large currency mismatches or underdeveloped markets. While interventions can have benefits in the short-term, sustained over time they could entrench unfavorable initial conditions, though more work is needed to establish this empirically. A first effort to measure the cost of interventions to the credibility of policy frameworks suggests that the negative impact may be smaller than often assumed—at least for the set of more sophisticated inflation-targeting emerging-market central banks considered here.