BUZZ-Petrobras: U.S.-listed shares jump as pro-business challenger surges in Brazil poll
** State-run Brazilian oil company's U.S.-listed shares up 15 pct at $16.10 premarket after surprise gains by pro-business presidential candidate Aecio Neves
** Neves rides a dramatic late surge and won strong support in the first round of voting on Sunday and will face incumbent Dilma Rousseff in a runoff on Oct. 26
** Petrogras investors have lambasted Rousseff government for forcing company to import fuel at global prices and sell it at loss in the domestic market to tamp down inflation
** Multi-million dollar kickback scandal roiling Petrobras was key campaign issue
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