Local institutions bought a net 224 billion won worth of shares on the main board, and foreign investors a net 89 billion won. Individual investors sold a net 343 billion won worth of shares.
Advancers led decliners by 420 to 338, with 117 issues ending unchanged.
A total of 272 million shares worth 4.9 trillion won changed hands, compared with 295 million shares worth 4.9 trillion won on Tuesday.
The KOSPI 200 December futures index <KSc1> rose 2.05 points to 211.50, and the KOSPI 200 spot index <.KS200> added 2.56 points to 211.56.
The junior Kosdaq market <.KQ11> edged up 0.13 percent to close at 472.54.
Move on day +1.13 percent
12-month high 1,723.17 23 SEPT 2009
12-month low 914.02 21 NOV 2008
Change on yr +42.6 percent
All time high 2,085.45 1 NOV 2007
All time low 93.10 6 JAN 1981
(Additional reporting by Shin Jieun; Editing by Jonathan Hopfner)