Bank of America put about $1 billion of troubled debt on the market last week, consisting of nonperforming loans and some where payments have resumed, said the people, who asked not to be identified because the offerings are private. The Charlotte, North Carolina-based lender also is marketing about $1 billion of soured home loans with Wells Fargo & Co., according to one of the people. Citigroup is separately selling about $1 billion of nonperforming and re-performing mortgages, the people said.