We study the effect of loan portfolio focus vs. diversification on the return and the risk of 105 Italian banks over the period 1993-1999 using data on bank-by-bank exposures to different industries and sectors. We find that diversification is not guaranteed to produce superior performance...

We study empirically the effect of focus (specialization) vs. diversification on the return and the risk of banks using data from 105 Italian banks over the period 1993-1999. Specifically, we analyze the tradeoffs between (loan portfolio) focus and diversification using a unique data set that is...

We study empirically the effect of focus (specialization) vs. diversification on the return and the risk of banks using data from 105 Italian banks over the period 1993-1999. Specifically, we analyze the tradeoffs between (loan portfolio) focus and diversification using a unique data set that is...

We propose and test a theory of corporate liquidity management in which credit lines provided by banks to firms are a form of monitored liquidity insurance. Bank monitoring and resulting credit line revocations help control illiquidity-seeking behavior by firms. Firms with high liquidity risk...

We propose and test a theory of corporate liquidity management in which credit lines provided by banks to firms are a form of monitored liquidity insurance. Bank monitoring and resulting credit line revocations help control illiquidity-seeking behavior by firms. Firms with high liquidity risk...

We suggest a new mechanism–the liquidity insurance channel–based on the widespread reliance of high credit quality firms on bank credit lines for liquidity management. Our model matches the patterns of usage of loans and credit lines in the cross-section of firms, and defines the conditions...

We address the paradox that financial innovations aimed at risk-sharing appear to have made the world riskier. Financial innovations facilitate hedging idiosyncratic risks among agents; however, aggregate risks can be hedged only with liquid assets. When risk-sharing is primitive, agents...

We propose and model that firms face two potential defaults: Financial default on their debt obligations and operational default such as a failure to deliver on obligations to customers. Hence, firms with limitations on outside financing substitute between saving cash for financial hedging to...

There has emerged in the Western economies a strong nexus between the credit risks of financial sectors and their sovereigns. We argue that this phenomenon can be understood in the context of two debt overhang problems: one affecting the financial sector due to its under-capitalization following...

The U.S. bank stress tests aim to improve financial system stability. However, they may also affect bank credit supply. We formulate and test opposing hypotheses about these effects. Our findings are consistent with the Risk Management Hypothesis, under which stress-tested banks reduce credit...