Polish opposition cheers presidential vote win, markets uneasy

Presidential candidate of the Law and Justice Party Andrzej Duda (L) casts his vote next to his wife Agata and daughter Kinga at a polling station in Krakow, Poland May 24, 2015. REUTERS/Mateusz Skwarczek/Agencja Gazeta

WARSAW (Reuters) - Poland's main opposition party celebrated its first national election win in a decade on Monday, after its candidate for the presidency unexpectedly defeated incumbent Bronislaw Komorowski in a result that unnerved financial markets.

Andrzej Duda won Sunday's vote by 52 percent to 48 percent, an exit poll showed. His Law and Justice party is close to the Catholic church, socially conservative and considered less business-friendly and less pro-European Union than the governing Civic Platform.