US Banks Have $620 Billion of Unrealized Losses on Their Books
   [1]https://www.bloomberg.com/graphics/2023-svb-exposed-risks-banks/?ai=
   eyJpc1N1YnNjcmliZWQiOmZhbHNlLCJhcnRpY2xlUmVhZCI6ZmFsc2UsImFydGljbGVDb3V
   udCI6MCwid2FsbEhlaWdodCI6MX0=
   The investment losses that helped take down Silicon Valley Bank are a
   problem, to one degree or another, across the US financial system. In
   total, the industry ended last year with $620 billion of unrealized
   losses on its books from investments in low-yielding bonds.
   For most banks, the issue is manageable.
   Bonds held in investment books represented less than a quarter of the
   banking system’s $23.6 trillion of assets in December, and unlike SVB,
   lenders usually have a wide array of depositors who are unlikely to all
   need money around the same time. For the biggest banks, the risks are
   even smaller. They are perceived as too big to fail. What’s more, the
   recent rally in the Treasury bond market — sparked, ironically, by the
   jitters about the health of the banking industry — is helping to shrink
   the $620 billion of paper losses. (In the coming weeks, banks will
   start to post first-quarter data.)
   Banks’ Equity Could Take Hit If Paper Losses Had to Be Realized
   For most banks, unrealized losses are a manageable problem. But
   investors and depositors remain jittery about lenders sitting on huge
   piles of money-losing bonds

References

   1. https://www.bloomberg.com/graphics/2023-svb-exposed-risks-banks/?ai=eyJpc1N1YnNjcmliZWQiOmZhbHNlLCJhcnRpY2xlUmVhZCI6ZmFsc2UsImFydGljbGVDb3VudCI6MCwid2FsbEhlaWdodCI6MX0=