FORTUNE's annual ranking of America's leading businesswomen

24 of 50
24. Mary Callahan Erdoes
Mary Callahan Erdoes
CEO, Asset Management
JP Morgan Chase
2011 rank: 24
Age: 45
J.P. Morgan lost nearly $6 billion (and counting) on bad bets by the ìLondon Whale,î but Erdoes's division made money by taking the other side of the trades. Revenue for her business climbed 6%, to $9.5 billion, last year, and Erdoes's assets grew to $2 trillion, a new high.
From the October 8, 2012 issue
How we pick the Power 50
The list is compiled by FORTUNE editors, who consider four criteria: the size and importance of the woman's business in the global economy, the health and direction of the business, the arc of the woman's career (resume and runway ahead), and societal and cultural influence.