Silicon Valley Bank was the tip of a banking iceberg

cointelegraph.com:

Traditional financial institutions take deposits from customers and use them to make loans. But they loan out much more than what they have in store at a given point in time — a concept known as fractional banking. On one hand, the difference between the interest on the loans and the interest paid to depositors is referred to as the net interest margin and determines a bank’s profitability. On the other hand, the difference between the assets and liabilities is referred to as their equity and determines the bank’s resilience to external shocks.

Before the latest run on the bank, SVB was viewed as not only a profitable banking institution but also a safe one because it held $212 billion in assets against roughly $200 billion in liabilities. That means they had a cushion of $12 billion in equity or 5.6% of assets. That’s not bad, although it is roughly half the average of 11.4% among banks.

The problem is that recent actions by the United States federal reserve reduced the value of long-term debt, to which SVB was heavily exposed through its mortgage-backed securities (roughly $82 billion). When SVB flagged to its shareholders in December that it had $15 billion in unrealized losses, wiping out the bank’s equity cushion, it prompted many questions.

Related: USDC depegged, but it’s not going to default

On March 8, SVB announced it had sold $21 billion in liquid assets at a loss and stated that it would raise money to offset the loss. But that it announced a need to raise more money — and even considered selling the bank — concerned investors significantly, leading to roughly $42 billion in attempted withdrawals from the bank. Of course, SVB did not have sufficient liquidity, and the Federal Deposit Insurance