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3. Mary Schapiro
Mary Schapiro
Chair of the SEC
Last year's rank: 6

Schapiro is in the midst of an unenviable juggling act, revamping enforcement at the agency that missed Madoff and the market meltdown. She's already put points on the board, securing a record $550 million settlement with Goldman Sachs.

NEXT: Kathleen Sebelius

Last updated September 29 2010: 11:28 AM ET
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