What Happens in the Banking Sector Won’t Stay There

The sudden loss of confidence by depositors in some US banks is causing many to focus on the scope for financial contagion and the needed policy responses. What should not be overlooked is the other, and slower, contagion channel in play — that involving enablers of economic growth — which is less in focus but also important in determining how quickly the world’s largest economy will overcome this abrupt air pocket.

Banking is based fundamentally on trust. Any erosion in trust can, and does, lead to outcomes that were deemed highly unlikely or even unthinkable just a few days earlier.

This has played out recently with the sudden collapse of Silicon Valley Bank, the forced sale of Credit Suisse to UBS and the instability at First Republic Bank. Reacting to the news, US depositors have reallocated part of their funds away from smaller banks and into the largest banks deemed too big to fail, money market funds and even crypto assets such as Bitcoin.

The magnitude of these deposit flows is far from insignificant, a development that will become even more apparent when the (lagged) data is released on Friday. So far, numbers from the Federal Reserve show that small banks lost $120 billion of their deposits in the week ended March 15, or a 2% decline from the previous week, on a seasonally adjusted basis. By contrast, deposits at large banks increased $67 billion.

The loss of deposits reflect a simultaneous convergence of four factors: long-standing structural weaknesses in the most fragile banks; Fed supervisory lapses; an interest-rate hiking cycle that started late and was far too slow, forcing one of the most concentrated set of rate increases in history; and the simple upside/downside calculus that, in the context of shaken confidence, favors deposit transfers even when the risk is objectively deemed low.