The yield on the benchmark 10-year government bonds ended up 0.1 basis point at 3.635 percent. Lead December futures on three-year treasury bonds finished down 0.03 point at 105.49.
Foreign investors were net sellers in futures trading for 489.5 billion won ($461.81 million), up from their net selling worth 52.2 billion won on Tuesday.
Finance Minister Hyun Oh-seok dismissed a local newspaper report that cited an unnamed ministry official as saying there was a need for policymakers to consider an interest rate cut to avert deflation.