Generally the Ultra Elites are considered very stable, looking at their standings over the years they may move a little bit but usually only among each other. Their reputations took years to develop so they are pretty set. A lot of other schools like Tuck, NYU, Ross, Duke, Haas, Darden are established as the next bunch and once again they are pretty stable. If you go to a top school its a pretty safe bet that it will be a top school when you retire.