Most of their MBS mature in over 10 years, but THEY DID NOT BUY MOST OF THEM IN 2021.
"As of December 31, 2022, on a consolidated basis, we had total assets of $211.8 billion, total investment securities of $120.1 billion, total loans, amortized
cost, of $74.3 billion, total deposits of $173.1 billion and total SVB Financial stockholders' equity of $16.0 billion."
Read their financial statement. They are well capitalized, even with a 20% write down of assets. Depositors will suffer very little direct losses if any, the bank run just killed them because of their shitty allocation. A bigger bank will gladly pick them up after an audit.
Financial Statement: https://d18rn0p25nwr6d.cloudfront.net/CIK-0000719739/f36fc4d7-9459-41d7-9e3d-2c468971b386.pdfAs of December 31, 2022, Even with a 20% write down of MBS