Major mortgage servicers are widely expected to agree to principal reduction for some struggling homeowners as part of the price of settling complaints over foreclosure practices brought by state attorneys general. That idea doesn’t sit well with some MBS investors, who are concerned that they will end up paying some of the cost of reducing principal as a way to keep distressed borrowers in their homes. The Association of Mortgage Investors warns that principal reduction of securitized loans would be akin to forcing the middle class to bear the settlement’s burden. In a statement, the AMI warned that principal reductions could...