Seoul shrinks bond supply by 8.5 trillion won as US 10-year yields hit their highest since 2002

Together, the issuance cut and the buybacks leave investors 8.5 trillion won less Korean government paper to absorb than the original plan implied ^[14]. In a buyback the government bids for its own bonds, and in the JoongAng Daily's description that adds demand and eases upward pressure on yields ^[9]. Both steps act on quantity. The rise in yields came from abroad, led by the United States ^[4], and a thinner Korean auction calendar does not change what an investor earns by holding US Treasuries instead ^[11].

The reports do not give the size of the original October plan or say whether the 5 trillion won is cancelled or only deferred. They also do not quote Bank of Korea Governor Shin Hyun-song, who attended Friday's meeting ^[6]. So the only backstop on offer comes from the finance ministry. Lee said it would "work closely with relevant agencies to take market stabilization measures, including emergency buybacks, depending on market conditions" ^[3].

Issuing less in October means the Treasury pays for that month's spending out of cash or borrows the money later, unless spending falls ^[1]. Emergency buybacks need funding too.

There are three ways this could go. US yields could retreat from Thursday's intraday high ^[11], letting the Korean three-year slip back under 4.0 percent ^[12], and the October cut would get credit for a turn it happened to coincide with. Or US yields keep climbing, Seoul carries out the emergency buybacks ^[3], and it spends money supporting a price set in another market. The third possibility is that the 5 trillion won turns out to be a deferral ^[1], and the relief reverses once that paper reaches auction.

I think the steps take some pressure off Korean yields while their level keeps following US Treasuries. I would be proved wrong if the Korean three-year yield fell back below 4.0 percent while the US 10-year stayed above 5.3 percent ^[11][12]. That would mean Seoul's supply management was setting the level after all.

If the policy floor turns out to be soft, corporate borrowers carry the cost. "If high interest rates persist, businesses with lower credit ratings could face greater refinancing burdens," Lee said ^[5].

Lee has also widened the meeting. Land Minister Hong Jee-sun joined the four finance officials known as the F4 on Friday ^[6], and Lee said he wants it to review "the macroeconomy and the financial, foreign exchange and real estate markets within a single framework" ^[8].