The bosses of Wall Street banks Goldman Sachs and Citigroup are the latest executives to fall victim to an email prankster who has also managed to connect with the head of Barclays and the governor of the Bank of England, Reuters reported. While neither Goldman CEO Lloyd Blankfein nor his Citi counterpart Michael Corbat revealed any sensitive information, the exchanges will raise questions about the way banks' computer systems handle emails to addresses outside their companies. Blankfein was drawn into the simple hoax when he replied to an email purporting to be from his company's president and co-chief operating officer, Harvey Schwartz, congratulating him on a tweet that Blankfein wrote last week on a trip to China about the country's impressive infrastructure.