Tradable bonds in KRX KTB are Korea Treasury Bonds (KTBs), Monetary Stabilization Bonds (MSBs) and Deposit Insurance Fund Bonds (DIFBs).

Item Details
KTBs Benchmark The most recently auctioned Treasury issues of a given maturity, or the on-the-run Treasury issues, are designated as benchmarks by the Minister of Strategy and Finance. These issues include the 3-year, 5-year, 10-year, 20-year, 30-year KTBs; and the 10-year inflation-linked KTBs (KTBis).
Non-benchmark KTBs excluding benchmarks, or the off-the-run Treasury issues
MSBs Monetary Stabilization Bonds (less than 2 years of maturity) issued by BOK (Bank of Korea)
DIFBs Deposit Insurance Fund Bonds issued by KDIC (Korea Deposit Insurance Corporation)