The liabilities were actually the deposits in the bank if someone knew how to read a bank balance sheet. The assets were the loans and cash including the $4B deposit which JPMC gave back.
So the thought that JPMC left the liabilities behind is ludicrous. By buying the bank from the FDIC they covered all deposits/liabilities over the $250K FDIC limit.
As far as your investment here that's your decision.
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