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posted on 02 February 2016

Counterparties And Collateral Requirements For Implementing Monetary Policy - Part Two Of Four

from Liberty Street Economics

-- this post authored by Emily Eisner, Antoine Martin, and Ylva Sovik

What types of counterparties can borrow from or lend to a central bank, and what kind of collateral must they possess in order to receive a loan? These are two key aspects of a central bank's monetary policy implementation framework. Since at least the nineteenth century, it has been understood that an important role of central banks is to lend to solvent but illiquid institutions, particularly during a crisis, as this provides liquidity insurance to the financial system.

They also provide liquidity to markets during normal times as a means to implement monetary policy. Central banks that rely on scarcity of reserves need to adjust the supply of liquidity in the market, as described in our previous post[add link]. In this post, we focus on liquidity provision related to the conduct of monetary policy .

Although there are some exceptions, central banks normally provide liquidity against collateral and to a restricted set of counterparties. The objective of these restrictions is to limit the central bank's exposure to credit risk. Any losses are ultimately borne by taxpayers, so it is important to avoid them. Indeed, most central banks make profits that are rebated to the government. Lower profits, or an outright loss, would have to be made up by additional tax revenue or expenditure reductions. Large or regular losses could also weaken a central bank's reputation and threaten its independence. For a more detailed discussion of central bank collateral and counterparty policies, see the IMF working paper, "Central Bank Collateral Frameworks: Principles and Policies." For a detailed description of a current collateral and counterparty framework, see the Bank of England's Red Book.

Understanding Counterparties

A narrow set of counterparties will typically prove easier for a central bank to monitor. In normal times, its counterparties will redistribute liquidity efficiently through financial markets. However, during periods of market turbulence financial institutions may become reluctant to lend to each other so relying on a narrow set of counterparties may not work effectively. This could reduce the ability of the central bank to provide funding when and where it is needed.

Although a wider set of counterparties can increase a central bank's monitoring costs, such expenses can be reduced by requiring collateral, particularly if the required collateral is very safe. Nevertheless, it is important for a central bank to be able to assess the solvency and viability of its counterparties. This is one reason central banks often have supervisory authority over the institutions to which they can lend.

Most central banks have largely the same counterparties in their market operations and standing facilities. This is the case, for instance, for the European Central Bank (ECB), the Bank of England (BoE), Norges Bank, and the Reserve Bank of Australia (RBA). However, the RBA uses a more expansive definition of eligible institutions for its market operations than for its standing facilities. The Federal Reserve has different counterparties for its short-term market operations, which are directed at adjusting the supply of reserves, than for its standing facilities, which can help prevent market rates from increasing too much. The supply of reserves is typically adjusted through repurchase agreements, or repos, with primary dealers that are not necessarily deposit-taking banks, and most deposit-taking U.S. banks do not participate in these operations. Conversely, only deposit-taking U.S. banks have access to liquidity insurance through the discount window.

When the counterparties for a central bank's standing facilities and market operations coincide, deposit-taking banks are always eligible counterparties. In some cases, such as at the BoE until 2009, only a subset of banks is eligible. Some central banks also require that their counterparties be of a sufficiently large size. Even when these limitations are not binding, many smaller banks choose to forgo the costs associated with becoming a direct counterparty. Typically only domestic banks are eligible, but a number of central banks allow local branches of foreign banks be counterparties. Some central banks accept bank-like savings institutions as counterparties. For instance, building societies can be counterparties with the BoE. It should be noted that the definition of a bank varies between jurisdictions. In some jurisdictions, the term "bank" includes universal banks, which can have both a deposit-taking institution and a broker-dealer. In other jurisdictions, bank only refers to deposit-taking institutions.

Some counterparties can lend to the central bank but cannot borrow. For example, the Fed borrows from money market mutual funds (MMFs) through its reverse repo (RRP) program, but MMFs cannot borrow from the Fed. In addition, some central banks give or have the discretion to give non-banks access to facilities or market operations for financial stability purposes, but we will not discuss that further here.

Collateral for Open Market Operations

When setting their collateral policies, central banks need to balance the need for adequate protection against possible losses with the need for the collateral to be sufficiently plentiful. If the acceptable collateral is too scarce, the central bank may not be able to conduct the open market operations necessary to implement monetary policy effectively and to support the smooth functioning of the payment system.

Some central banks, including the Fed, only accept a narrow set of very safe collateral for their monetary policy operations, such as domestic government debt and debt issued by domestic government-guaranteed agencies. These assets are risk free from the point of view of the consolidated sovereign and are accepted by all central banks. Accepting only this restricted set works well if the supply of outstanding government bonds in local currency is large, or if the liquidity needs of the financial system are small. Historically that has been the scenario faced by the Fed, although there were some concerns that the supply of government debt might become too small around the turn of the century, as discussed in thispaper from the Federal Reserve Bank of Kansas City. The BoE also accepted only a narrow range of collateral before the crisis, although it accepted some highly rated non-domestic government debt.

In some cases, allowing only domestic government debt and debt issued by domestic government-guaranteed agencies as collateral will not be sufficient for a central bank to carry out the necessary monetary operations. For example, some countries have too little outstanding sovereign debt. This is the case for the Reserve Bank of Australia and theReserve Bank of New Zealand. Furthermore, some interbank payment systems require a lot of central bank lending in order to function smoothly. This is the case for Norges Bank. In each of these cases, it may be necessary to expand the set of acceptable collateral at the central bank. Finally, the ECB, and thus the Eurosystem - which comprises national central banks in the euro area and the ECB - accepts a broad range of assets as collateral. The aim is to enable a broad and heterogeneous set of banks to borrow from the central bank and to avoid a preferential treatment of government debt.

When central banks accept a wider set of collateral, they face a trade-off between different sources of risk. Enlarging the set of acceptable collateral beyond home-country sovereign debt means accepting riskier securities. One possibility is to accept highly rated privately issued bonds, such as covered bonds. Another is to accept sovereign debt issued by other countries, although this will expose the central bank to exchange rate risk. Central banks that accept a wide range of issuers and currency denominations typically require both public and private collateral to be highly rated.

Collateral for Lending Facilities

Many central banks have lending facilities, sometimes called discount windows. As noted in our previous post in this series, these facilities are expected to put a ceiling on the target interest rate. The range of accepted collateral for standing liquidity facilities is often wider than acceptable collateral for open market operations, and never narrower. For example, the Federal Reserve accepts a much wider set of collateral at its discount windows than for its open market operations. In contrast, the ECB and Norges Bank are examples of central banks that accept the same pool of collateral against their discount windows and their market operations.

Haircuts on Eligible Collateral

To protect the central bank against the risk that the collateral will fall in value (in local currency terms), central banks require the loans they make to be over-collateralized - meaning that the value of the collateral exceeds the value of the loan. The amount of overcollateralization varies depending on the risk associated with the collateral, including the exchange-rate risk when the collateral is denominated in a foreign currency. These margins, or haircuts, are typically based on the observed volatility in the market prices of the respective securities. Prior to the financial crisis, haircuts typically varied from less than 1 percent to around 40 percent. For an example of a set of haircuts see the Fed's discount window haircuts.


Central banks conduct their lending through a limited number of counterparties and against collateral. The main aims of these policies are to protect the central banks against risk of losses, while ensuring implementation of monetary policy and smooth functioning of the payment system. There is significant variation in the counterparty and collateral regimes put into place to achieve these goals.


The views expressed in this post are those of the authors and do not necessarily reflect the position of the Federal Reserve Bank of New York or the Federal Reserve System. Any errors or omissions are the responsibility of the authors.


About the Authors

Emily Eisner is a senior research analyst in the Federal Reserve Bank of New York's Research and Statistics Group.

Martin_antoineAntoine Martin is a senior vice president in the Federal Reserve Bank of New York's Research and Statistics Group

Ylva Søvik is a deputy director at Norges Bank, the central bank of Norway.

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