The South Korean won was stable against the dollar after inching higher as the currency began its first day of 24-hour trading, marking a milestone in Seoul’s push to open its financial markets to global investors. The won eased 0.1 per cent to 1,531.40 against the US dollar, after rising as much as 0.2 per cent when it started trading at 6am. Other major currency pairs were little changed. The launch of 24-hour trading is the centrepiece of a years-long effort to improve foreign access to local