Bank of America may be prepared to pony up $8.5 billion to settle litigation with residential mortgage-backed securities investors, but it’s not conceding a point in the face of government accusations that it discriminated against mortgage borrowers with disabilities. Last week, the Department of Housing and Urban Development accused the bank of imposing unnecessary and burdensome requirements on borrowers who depended on disability income to qualify for their mortgages in violation of the Fair Lending Act. The bank also allegedly required some disabled borrowers to provide physician...