Muriel 'Mickie' Siebert was also New York's 1st banking superintendent
                                
                                
                                    (Newser) -
                                    Muriel "Mickie" Siebert, who started as a trainee on Wall Street and became the first woman to own a seat on the New York Stock Exchange, died Saturday of complications of cancer at age 80. Her death was confirmed by Jane Macon, a director of Siebert Financial, which Siebert...