Please understand that it is NOT a banking fraud, not a 2008 kind of scenario and its spread as a contagion impacting large US Banks is very unlikely.
It was just mismanagement by the bank wherein it made the good ol' mistake which every financial person worth his salt warns of - using low maturity deposits to buy long duration bonds to boost short term profits.
They still could've got away with it had the interest rates started falling down as anticipated. But got hurt badly as rates rose in the current tightening cycle. It was double whammy for them. Higher deposit rates and falling asset values.
Great value for money emerging due to fear...