Buffett-Backed 30-Year-Old Goes to War With Brazilian Banks
Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., speaks at the Goldman Sachs 10,000 Small Businesses Summit in Washington. (Photographer: Andrew Harrer/Bloomberg)

Buffett-Backed 30-Year-Old Goes to War With Brazilian Banks

(Bloomberg) -- At 30 years old, Thiago Piau is no stranger to picking fights with giants.
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