The Won dropped to the lowest in four years amid speculation lawmakers would prefer depreciation to support exporter of South Korea against more competitive Japanese rivals. The currency slid 0.3% to 1,119.05 per greenback, after earlier fall of 0.7%, the biggest intraday slump since April 8. Generally the Won depreciated 4.9% per Dollar and advanced 10% versus the Yen in the same period. The Bank of Korea indicated that it would impose market- stabilizing measures if necessary.