SEOUL — South Korean stocks fell for a second session on Wednesday, with the KOSPI closing down 137.49 points, or 1.98 percent, at 6,803.90, the lowest finish since Sept. 17, as foreign selling outweighed a record night on Wall Street.

The index opened 1.11 percent lower and extended the loss into the close. The Kosdaq fell 2.34 percent to 898.43. Samsung Electronics ended down 1.29 percent, erasing an early gain, and SK Hynix lost 2.82 percent. Of 917 issues traded, 333 rose and 527 fell. Foreign investors were net sellers of about 2.61 trillion won, roughly $1.94 billion. Institutions sold a net 672.6 billion won. Retail investors bought a net 2.56 trillion won. The won was........

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