Goldman Sachs’ analyst William Tanona reminded investors on Thursday about the lingering effects of subprime and the very real potential for future write downs from large US banks.  The list included Citigroup (NYSE: C), JP Morgan (NYSE: JPM), and Merrill Lynch (NYSE: MER).  Tanona singled out Citigroup and noted that they will probably be cutting their dividend by 40%, despite recent comments by their new CEO.  Tanona wrote that we may have two more quarters of pain before the markets have “fully digested” the subprime drama.