[beezle]

No, please do not even try to imply that this was the Fed's fault.

They did not raise "suddenly". The move away from ZIRP was well telegraphed. Once they did the first hike the only question was how fast and how far. Most in the market initially expected an end rate around 3% (ie, 100bp over their target inflation rate of 2%). As it became increasingly clear that the inflation was not just about supply chain disruptions that end rate target went to 4% and higher.

Further - every bank has a team with one responsibility - asset and liability management. They are responsible for not just the product choices (ie, MBS vs Treasuries, etc) but also matching durations. The Treasurer of the bank is also responsible for oversight, including whether or not any of these positions should be hedged and to what extent.

This is entirely on the bank staff and management.