Gara M. Afonso

How Do Global Banks Scramble for Liquidity? Evidence from the Asset-Backed Commercial Paper Freeze of 2007

In August of 2007, banks faced a freeze in funding liquidity from the asset-backed commercial paper (ABCP) market. We investigate how banks scrambled for liquidity in response to this freeze and its implications for the real economy. Commercial banks in the United States raised deposits and took advances from Federal Home Loan Banks (FHLBs). In contrast, foreign banks – with limited access to the deposit market and FHLB advances – lent less in the overnight interbank market and borrowed more from the Federal Reserve’s Term Auction Facility (TAF) auctions. Relative to before the ABCP freeze and relative to their non US dollar lending, foreign banks with ABCP exposure charged higher interest rates on syndicated loan packages denominated in dollars. The results point to a funding risk in global banking, manifesting as currency shortages for banks engaged in maturity transformation in foreign countries.

Systemic Risk and Liquidity in Payment Systems

We study liquidity and systemic risk in high-value payment systems. Flows in high-value systems are characterized by high velocity, meaning that the total amount paid and received is high relative to the stock of reserves. In such systems, banks rely heavily on incoming funds to finance outgoing payments, necessitating a high degree of coordination and synchronization. We use lattice-theoretic methods to solve for the unique fixed point of an equilibrium mapping and conduct comparative statics analyses on changes to the environment. We find that banks attempting to conserve liquidity cause an increase in the demand for intraday credit and, ultimately, a disruption of payments. Additionally, we find that when a bank is identified as vulnerable to failure and other banks choose to cancel payments to that bank, there are systemic repercussions for the whole financial system.

An Empirical Study of Trade Dynamics in the Fed Funds Market

We use minute-by-minute daily transaction-level payments data to document the cross-sectional and time-series behavior of the estimated prices and quantities negotiated by commercial banks in the fed funds market. We study the frequency and volume of trade, the size distribution of loans, the distribution of bilateral fed funds rates, and the intraday dynamics of the reserve balances held by commercial banks. We find evidence of the importance of the liquidity provision achieved by commercial banks that act as de facto intermediaries of fed funds.

A Model of the Federal Funds Market: Yesterday, Today, and Tomorrow

The landscape of the federal funds market changed drastically in the wake of the Great Recession as large-scale asset purchase programs left depository institutions awash with reserves, and new regulations made it more costly for these institutions to lend. As traditional levers for implementing monetary policy became less effective, the Federal Reserve introduced new tools to implement the target range for the federal funds rate, changing this landscape even more. In this paper, we develop a model that is capable of reproducing the main features of the federal funds market, as observed before and after 2008, in a single, unified framework. We use this model to quantitatively evaluate the evolution of interest rates and trading volume in the federal funds market as the supply of aggregate reserves shrinks. We find that these outcomes are highly sensitive to the dynamics of the distribution of reserves across banks.