Banks investigated via subpoenas include Citigroup, Goldman Sachs, Merrill Lynch and Morgan Stanley over inflated mortgage grades and misleading ratings agencies The New York attorney general is investigating whether eight Wall Street banks misled ratings agencies to inflate the grades of certain mortgage securities. The attorney general of New York, Andrew Cuomo, sent subpoenas to eight banks last night, according to the New York Times . The paper named Citigroup, Credit Agricole, Credit Suisse, Deutsche Bank, Goldman Sachs, Merrill Lynch – now owned by Bank of America – Morgan Stanley and UBS as the banks under scrutiny