The currency weakened to 19.70 to the dollar before retracing some of its losses to 19.65 - on track for its worst session since early November. That was not far off the 19.80 level it hit just after the deadly earthquake struck in early March.
Parties of both incumbent Tayyip Erdogan and opposition rival Kemal Kilicdaroglu were claiming the lead but sources in both camps admitting they may not clear the 50% threshold to win outright. The presidential vote will decide not only who leads Turkey and shapes the foreign policy of the NATO-member country of 85 million people, but also how it is governed and its economic future amid a deep cost of living crisis. "It is hard to foresee a market-positive scenario emerging from today’s double vote in Turkey," Wolfgango Piccoli at Teneo wrote in a note to clients.
The lira, which is prone to sharp swings before regular trading hours, has weakened 5% since the start of the year.
The currency has lost almost 95% of its value over the last decade and a half as sugar-rush economic policies have led to spectacular boom and bust cycles and rampant bouts of inflation and currency market turmoil.
A potential second round is scheduled for May 28.
(Reporting by Karin Strohecker; Editing by Frank Jack Daniel)