AI Summary. An examination of 25 years of US banking trends finds deposits—especially uninsured deposits—have grown rapidly while banks have shifted from information-intensive lending toward longer-term securities such as mortgage-backed securities and long-term Treasuries. The authors argue these trends favor strengthening liquidity regulation over expanding deposit insurance to reduce bank-run risk.

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Deposits – especially uninsured deposits that create run risk – have risen sharply, while banks with the most rapid growth in deposits have shifted assets away from lending towards longer-term MBS and Treasuries. @lauramnicolae

Should regulators strengthen liquidity rules rather than expand deposit insurance?

Core argument: Bank deposits, especially uninsured deposits, have grown rapidly on the liability side of bank balance sheets over the last twenty-five years, according to an examination of banking industry trends.

To inform the ongoing discussion of the appropriate regulatory response to [such events as] the failures of three regional banks 2023, we examine trends in the banking industry over the last twenty-five years. On the liability side of bank balance sheets, deposits—and especially uninsured deposits—have grown rapidly. On the asset side, there has been a notable shift away from the information-intensive lending traditionally associated with banks and towards longer-term securities such as MBS and long-term Treasuries. We assess the main regulatory options to reduce the risk of destabilizing bank runs—expanding deposit insurance and strengthening liquidity regulation— and argue that the industry trends we document favor the latter option. Regulators may be more comfortable tightening liquidity requirements on uninsured deposits, insofar as the substantial increase in those deposits in recent decades has not been correlated with an increase in information-intensive lending.

Takeaways by Macro Roundup® AI

  1. Bank deposits, especially uninsured deposits, have grown rapidly on the liability side of bank balance sheets over the last twenty-five years, according to an examination of banking industry trends.
  2. On the asset side, banks have shifted away from the information-intensive lending traditionally associated with them and toward longer-term securities such as mortgage-backed securities and long-term Treasuries.
  3. Documented industry trends favor strengthening liquidity regulation over expanding deposit insurance to reduce the risk of destabilizing bank runs, since the increase in uninsured deposits has not been correlated with an increase in information-intensive lending.