Why US regulators let banks lose billions — as long as losses are 'unrealized'
The danger posed by paper losses on bonds is newly relevant with the failure of Silicon Valley Bank. The debate about their treatment goes back decades.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction: Why US regulators let banks lose billions — as long as losses are 'unrealized'

### Response: The danger posed by paper losses on bonds is newly relevant with the failure of Silicon Valley Bank. The debate about their treatment goes back decades.