When Erdoes joined J.P. Morganís asset management team in 1996 the division managed a mere $179 billion. Today her group is responsible for $1.3 trillion in assets. Revenue hit a
record of almost $9 billion in 2010, while net income jumped 20% to a three-year high of $1.7 billion.
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the womanís business in the global economy, the health and direction of the
business, the arc of the womanís career (resume and runway ahead), and societal and cultural influence.