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4. Ho Ching
Ho Ching
Executive Director and CEO
Temasek Holdings
Country: Singapore
2007 rank: 12

Ho, 55, has presided over Temasek Holdings' remarkable growth streak. Since Ho took over in 2004, Singapore's state-owned investment company has doubled in size, to $130 billion in assets. She caught the financial world's attention last year when Temasek made a $5 billion bet on Merrill Lynch. Now that bet may already be paying off: If the Bank of America deal goes through, Temasek stands to add $1.5 billion to its bottom line.

NEXT: Marjorie Scardino
Last updated September 29 2008: 1:21 PM ET
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