South Korea's Finance Ministry says watching bond market developments closely and plans to use excess tax revenue to lower bond issuance if required

The toolkit cited here, trimming issuance using excess tax revenue and conducting treasury buybacks, operates on the supply side of the curve rather than through the policy rate, which distinguishes it from central bank action and means the effect concentrates in the belly and long end rather than the front. Governments in this position have historically found that conditioned language ("if required", "if yields rise excessively") steadies the market only while the fiscal headroom is credible; repeated pledges without follow-through have tended to see the premium rebuild. What separates durable stabilisation from a holding pattern is whether the buyback and reduced-issuance commitments are quantified and scheduled, and whether the central bank's stance is pulling in the same direction. Worth noting is that excess tax revenue is a finite and cyclical resource, so the capacity to cap supply shrinks precisely when growth and receipts soften. The follow-ons are any issuance calendar revision, the size and pricing of the first buyback operation, and whether auction tails narrow in the interim.