Flight to Quality and Collective Risk Management

We present a model of flight to quality episodes that emphasizes systemic risk and the Knightian uncertainty surrounding these episodes. Agents make risk management decisions with incomplete knowledge. They understand their own shocks, but are uncertain of how correlated their shocks are with systemwide shocks. Aversion to this uncertainty leads them to question whether their private risk management decisions are robust to aggregate events, generating conservatism and excessive demand for safety. We show that agents’ actions lock-up the capital of the financial system in a manner that is wasteful in the aggregate and can trigger and amplify a financial accelerator. The scenario that the collective of conservative agents are guarding against is impossible, and known to be so even given agents’ incomplete knowledge. A lender of last resort, even if less knowledgeable than private agents about individual shocks, does not suffer from this collective bias and finds that pledging intervention in extreme events is valuable. The benefit of such intervention exceeds its direct value because it unlocks private capital markets.

International Liquidity Management: Sterilization Policy in Illiquid Financial Markets

During the booms that precede crises in emerging economies, policy makers often struggle to limit capital flows and their expansionary consequences. The main policy tool for this task is sterilization - essentially a swap of international reserves for public bonds. However, there is an extensive debate on the effectiveness of this policy, with many arguing that it may be counterproductive once the (over-) reaction of the private sector is considered. But what forces account for the private sector's reaction remain largely unexplained. In this paper we provide a model to discuss these issues. We emphasize the international liquidity management aspect of sterilization over the traditional monetary one, a re-focus that seems warranted when the main concern is external crisis prevention. We first demonstrate that policies to smooth expansion in anticipation of downturns can be Pareto improving in economies where domestic financial markets are underdeveloped. We then discuss the implementation and effectiveness of this policy via sterilization. The greatest risk of policy arises in situations where policy is most needed - that is , when financial markets are illiquid. Our mechanism is akin to the implicit bailout' problem, although the central bank acts non-selectively and only intervenes through open markets in our model. Illiquidity replaces corruption and ineptitude. In addition to an appreciation of the currency and the emergence of a quasi-fiscal deficit, the private sector's reaction to sterilization may lead to an expansion rather than the desired contraction in aggregate demand or nontradeables investment and to a bias toward short term capital inflows. The main insights extend to international liquidity management issues more generally.

Musical chairs: a comment on the credit crisis.

Uncertainty –that is, a rise in unknown and immeasurable risk rather than the measurable risk that the financial sector specializes in managing– is at the heart of the recent liquidity crisis. The financial instruments and derivative structures underpinning the recent growth in credit markets are complex. Because of the rapid proliferation of these instruments, market participants cannot refer to a historical record to measure how these financial structures will behave during a time of stress. These two factors, complexity and lack of history, are the preconditions for rampant uncertainty. We explain how a rise in uncertainty can cause a liquidity crisis and discuss central bank policies in this context.

International Liquidity Illusion: On the Risks of Sterilization

During the booms that precede crises in emerging economies, policymakers often struggle to limit capital flows and their expansionary consequences. The main policy tool for this task is a sterilization of capital inflows - essentially a swap of international reserves for public bonds. Despite its widespread use, sterilization is often criticized for its ineffectiveness and, in extreme cases, its potential backfiring. We argue that these concerns are justified when countries experience occasional external crises and domestic financial markets are illiquid. In this context, while standard Mundell-Fleming considerations may determine the impact of the sterilization on short term peso interest rates, a potentially more powerful and offsetting mechanism is triggered by the anticipated reversal of this policy in the event of an external crisis. If the instruments used in the sterilization are illiquid or result in fiscal deficits that reduce the liquidity of the private sector, then the effective dollar cost of capital, which considers the whole path of expected future rates, may be lowered rather than raised by this policy. Most importantly, this dollar cost of capital reduction does not reflect a true increase in the country's international liquidity during the external crisis and reversal, as would be the case with a successful sterilization, but just a decline in domestic private liquidity. The impact of the latter on relative asset prices creates a sort of 'international liquidity illusion' which fosters rather than depress aggregate demand, and exacerbates short term capital inflows.

Inflation Targeting and Sudden Stops

Emerging economies experience sudden stops in capital inflows. As we have argued in Caballero and Krishnamurthy (2002), having access to monetary policy during these sudden stops is useful, but mostly for insurance' rather than for aggregate demand reasons. In this environment, a central bank that cannot commit to monetary policy choices will ignore the insurance aspect and follow a procyclical rather than the optimal countercyclical monetary policy. The central bank will also intervene excessively to support the exchange rate. These inefficiencies are exacerbated by the presence of an expansionary bias. In order to solve these problems, we propose modifying the central bank's objective to (i) include state-contingent inflation targets, (ii) target a measure of inflation that overweights non-tradable inflation

Fiscal Policy and Financial Depth

Most economists and observers place the lack of fiscal discipline at the core of the recent Argentine crisis. This begs the question of how countries like Belgium or Italy (pre-Maastricht) could run large fiscal deficits and accumulate debts far beyond those of Argentina, without experiencing crises nearly as dramatic as that of Argentina? Why is it that Argentina cannot act like Belgium or Italy and pursue expansionary fiscal policy during downturns? We argue that advanced and emerging economies differ in their financial depth, and show that lack of financial depth constrains fiscal policy in a way that can overturn standard Keynesian fiscal policy prescriptions. We also provide empirical support for this viewpoint. Crowding out is systematically larger in emerging markets than in developed economies. More importantly, this difference is extreme during crises, when the crowding out coefficient exceeds one in emerging market economies.

International Liquidity Management: Sterilization Policy in Illiquid Financial Markets

During the booms that invariably precede crises in emerging economies, policy makers often struggle to limit capital flows and their expansionary consequences. The main policy tool for this task is sterilization --essentially a swap of international reserves for public bonds. However, there is an extensive debate on the effectiveness of this policy, with many arguing that it may be counterproductive once the (over-) reaction of the private sector is considered. But what forces account for the private sector's reaction remains largely unexplained. In this paper we provide a model to discuss these issues. We first demonstrate that policies to smooth expansions in anticipation of downturns can be Pareto improving in economies where domestic financial markets are underdeveloped. We then discuss the implementation of this policy via sterilization, outlining cases in which the policy succeeds and those in which it fails. Paradoxically the greatest risk of policy arises in situations where policy is most needed -- that is when financial markets are illiquid. Our mechanism is akin to the ``implicit bailout" problem, despite the fact that the central bank acts non-selectively and only intervenes through open markets; illiquidity replaces corruption and ineptitude. In addition to an appreciation of the currency and the emergence of a quasi-fiscal deficit, the private sector's reaction to sterilization may lead to an expansion rather than the wanted contraction in aggregate demand and a bias toward short term capital inflows.