Not much has changed for Citi, even if the stock has quadrupled in just two weeks off its all-time low of 97 cents. Even under the most optimistic assumptions, Citigroup may be worth no more than a buck or two per share when stripped of all the businesses that once fattened its bottom line. What’s left?  Soliciting passbook deposits in order to make consumer loans? Not much fun in that, but anything fancier will require the kind of leap of faith on borrowers’ part that may be dead for 50 years. In any event,  we don’t see the nuttiness in this stock going much further, and that could put a drag on Goldman shares, even.