U.S. bank reserves debate highlights QT risks for lenders

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U.S. bank reserves and QT risks

Highlights

Cetina notes quantitative easing boosted U.S. bank reserves from about $50 billion pre-2008 to approximately $4 trillion at the pandemic peak, expanding uninsured deposits and balance sheet leverage risk.
Cetina warns further quantitative tightening risks straining banks by removing deposits and liquidity buffers, especially as Fed reserves approach the $3 trillion threshold tied to SVB's 2023 failure.
She advocates limiting further Fed balance sheet reduction, strengthening alternative liquidity measures, and maintaining strong leverage and liquidity rules to avoid discouraging lending amid faster loan growth in Q2 2026.

How QE reshaped bank balance sheets

As first reported by the Financial Times, Cetina says quantitative easing transformed the banking system by lifting reserves from about $50 billion before 2008 to roughly $4 trillion at the pandemic peak, while also creating large volumes of uninsured deposits that expanded bank balance sheets and increased pressure on leverage ratios.

She says the shift changed how banks interpreted their own growth. In her view, some institutions treated the influx of deposits as evidence of franchise strength rather than as a byproduct of central bank operations, then invested in long-dated government securities or other fixed-rate assets without fully accounting for the liquidity and interest-rate risks tied to a future reversal in Fed policy.

Cetina links that dynamic to the 2023 failures of Silicon Valley Bank and First Republic. She says supervisory and management failures mattered, but argues official reviews did not sufficiently address the role of QE itself or the absence of stronger Basel-style standards on interest-rate and liquidity risk for those banks.

Why further QT could strain the sector

Cetina says QT removes deposits from the banking sector and tightens funding conditions just as higher rates reduce the value of long-dated fixed-rate assets. She argues that combination can undermine banks that became concentrated in Treasuries, agency mortgage-backed securities or low-rate mortgages during the years of abundant liquidity.

She says the Fed should avoid pushing reserves below $3 trillion, which she describes as roughly the current level and the point at which SVB failed. She also notes that a previous liquidity buffer from money parked in the overnight reverse repo facility disappeared after balances there fell to zero, leaving banks with less protection if other Fed liabilities such as the Treasury general account drain cash from the system.

In place of aggressive balance-sheet reduction, Cetina argues for limiting further growth while improving other liquidity channels. She says policymakers could eliminate the ONRRP facility, consider reviving the Treasury Tax and Loan mechanism, ensure the discount window works smoothly, especially for smaller banks, and avoid discouraging use of Federal Home Loan Bank advances when liquidity tightens.

She also warns against easing leverage or liquidity rules in ways that encourage banks to hold more government securities at the expense of lending to households and small businesses. With loan growth already outpacing deposit growth in the second quarter of 2026, she says monetary authorities need to move carefully because shrinking the Fed balance sheet is easier for the central bank than for private financial institutions.

Our earlier coverage of the Strait of Hormuz disruption outlined how escalating U.S.–Iran tensions and renewed blockade threats disrupted shipping routes and raised fears of energy supply interruptions. We noted that the resulting surge in crude and gasoline prices added to inflation uncertainty and risked tightening financial conditions, affecting sentiment across sectors including financials ahead of key data and bank earnings.

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