SHAME ON March 12 (Bloomberg) -- Four Citigroup Inc. executives who bought the bank’s stock last week generated a $2.2 million paper profit within nine days, regulatory filings show. The executives, including director Roberto Hernandez , benefited as the company’s stock climbed 47 percent from March 10 through March 11 close of markets, after Chief Executive Officer Vikram Pandit said in a memo that the bank... read more