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Discussion Paper
How (Un-)Informed Are Depositors in a Banking Panic? A Lesson from History
How informed or uninformed are bank depositors in a banking crisis? Can depositors anticipate which banks will fail? Understanding the behavior of depositors in financial crises is key to evaluating the policy measures, such as deposit insurance, designed to prevent them. But this is difficult in modern settings. The fact that bank runs are rare and deposit insurance universal implies that it is rare to be able to observe how depositors would behave in absence of the policy. Hence, as empiricists, we are lacking the counterfactual of depositor behavior during a run that is undistorted by the ...
Report
Who Can Tell Which Banks Will Fail?
We study the run on the German banking system in 1931 to study whether depositors anticipate which banks will fail. We find that deposits decline by around 20 percent during the run. There is an equal outflow of retail and non-financial wholesale deposits from both failing and surviving banks. In contrast, we find that interbank deposits decline almost exclusively for failing banks. Our evidence suggests that while regular depositors are uninformed, banks have precise information about which banks will fail. In turn, banks being informed allows the interbank market to continue providing ...
Discussion Paper
Potential Flood Map Inaccuracies in the Fed’s Second District
The National Flood Insurance Program (NFIP) flood maps, which designate areas at risk of flooding, are updated periodically through the Federal Emergency Management Agency (FEMA) and community efforts. Even so, many maps are several years old. As the previous two posts in the Extreme Weather series show, climate-related risks vary geographically. It is therefore important to produce accurate maps of such risks, like flooding. In this post we use detailed data on the flood risk faced by individual dwellings as well as digitized FEMA flood maps to tease out the degree to which flood maps in the ...
Discussion Paper
The Adverse Effect of “Mandatory” Flood Insurance on Access to Credit
The National Flood Insurance Program (NFIP) was designed to reduce household and lender flood-risk exposure and encourage lending. In this post, which is based on our related study, we show that in certain situations the program actually limits access to credit, particularly for low-income borrowers—an unintended consequence of this well-intentioned program.
Discussion Paper
The Rise in Deposit Flightiness and Its Implications for Financial Stability
Deposits are often perceived as a stable funding source for banks. However, the risk of deposits rapidly leaving banks—known as deposit flightiness—has come under increased scrutiny following the failures of Silicon Valley Bank and other regional banks in March 2023. In a new paper, we show that deposit flightiness is not constant over time. In particular, flightiness reached historic highs after expansions in bank reserves associated with rounds of quantitative easing (QE). We argue that this elevated deposit flightiness may amplify the banking sector’s response to subsequent monetary ...
Discussion Paper
Flood Risk Outside Flood Zones — A Look at Mortgage Lending in Risky Areas
In support of the National Flood Insurance Program (NFIP), the Federal Emergency Management Agency (FEMA) creates flood maps that indicate areas with high flood risk, where mortgage applicants must buy flood insurance. The effects of flood insurance mandates were discussed in detail in a prior blog series. In 2021 alone, more than $200 billion worth of mortgages were originated in areas covered by a flood map. However, these maps are discrete, whereas the underlying flood risk may be continuous, and they are sometimes outdated. As a result, official flood maps may not fully capture the true ...
Discussion Paper
Flood Risk and Flood Insurance
Recent natural disasters have renewed concerns about insurance markets for natural disaster relief. In January 2025, wildfires wreaked havoc in residential areas outside of Los Angeles. Direct damage estimates for the Los Angeles wildfires range from $76 billion to $131 billion, with only up to $45 billion of insured losses (Li and Yu, 2025). In this post, we examine the state of another disaster insurance market: the flood insurance market. We review features of flood insurance mandates, flood insurance take-up, and connect this to work in a related Staff Report that explores how mortgage ...
Report
How Bad Are Weather Disasters for Banks?
Not very. We find even the most destructive weather disasters over the last quarter century had only modest effects on U.S. banks’ performance. This stability seems endogenous rather than a mere reflection of federal disaster aid, as disasters tend to increase loan demand which helps offset losses and boosts profits. Local banks avoid mortgage lending where floods are more common than official flood maps would predict, suggesting local knowledge may also mitigate disaster impacts. Our findings inform ongoing assessments of the physical risks to banks from climate change.
Journal Article
Understanding the Linkages between Climate Change and Inequality in the United States
The authors conduct a review of the existing academic literature to outline possible links between climate change and inequality in the United States. First, researchers have shown that the impact of both physical and transition risks may be uneven across location, income, race, and age. This is driven by a region’s geography as well as its ability to adapt. Second, measures that individuals and governments take to adapt to climate change and to transition to lower emissions risk increasing inequality. Finally, while federal aid and insurance coverage can mitigate the direct impact of ...
Discussion Paper
Documenting Lender Specialization
Robust banks are a cornerstone of a healthy financial system. To ensure their stability, it is desirable for banks to hold a diverse portfolio of loans originating from various borrowers and sectors so that idiosyncratic shocks to any one borrower or fluctuations in a particular sector would be unlikely to cause the entire bank to go under. With this long-held wisdom in mind, how diversified are banks in reality?