Uber executives ringing in the company’s first trade at the New York Stock Exchange last week. : The story of Uber’s disappointing I.P.O. — its fall from a potential $120 billion blockbuster to a much-smaller debut that fell even further — is one of mismanaged expectations with plenty of blame to go around, Mike Isaac, Michael de la Merced and Andrew report in the NYT. Trouble began with overambitious valuations. Bankers from Morgan Stanley said last fall that the company could be worth around $120 billion. That number quickly leaked, setting expectations of an I.P.O. that would gush wealth.