Its decision to dump its wholesale correspondent channel is the latest in a series of moves by Bank of America to distance itself from “legacy” mortgage issues, but analysts remain doubtful. Moody’s Investors Service last week downgraded the bank’s rating. “The downgrades result from a decrease in the probability that the U.S. government would support the bank, if needed,” thanks to the passage of the Dodd-Frank Wall Street Reform and Consumer Protection Act, the ratings firm said. Moody’s said that the government is likely to continue to provide some level of support to systemically important financial institutions. “However, it is also...