The Economic Daily News (13th exclusive) Nikkei 225 Index Tuesday (13th) opened at 68,564.85 points, down 0.68%. South Korea's KOSPI composite stock price index opened down 3.1%, and later widened losses to 4%, reaching 6,128.4 points. SK Hynix fell nearly 5%, leading South Korean chip stocks lower, while Samsung Electronics dropped nearly 4%. (yc)