Korean government bond yields plunged on May 27 as US-Iran ceasefire negotiations drove a sharp decline in international crude oil prices. The 3-year treasury yield fell 9.4 basis points to 3.865%, while the 10-year dropped 11.4bp to 4.333% and the 30-year declined 7.6bp to 4.567%. The drop followed reports that US President Donald Trump halted planned airstrikes against Iran on May 24 and stated that 'serious dialogue' was underway, with Trump telling reporters he was 'willing to listen' to Iranian proposals. West Texas Intermediate crude for September delivery fell approximately 5% on May 27 after dropping 3.12% the prior session. The yield decline reflected favorable conditions for oil-importing nations, with foreign investors net purchasing approximately 29,000 three-year bond futures contracts — the highest level since March 31 last year when they bought roughly 33,000 contracts.
Korean Treasury Yields Record Double-Digit Basis Point Declines
According to bond market data, the 3-year government bond final quote yield stood at 3.865%, down 9.4bp from the previous session. The 10-year yield plunged 11.4bp to 4.333%, while the 30-year fell 7.6bp to 4.567%. The 2-year yield declined 7.8bp to 3.723%, the 5-year dropped 9.7bp to 4.117%, the 20-year fell 8.1bp to 4.561%, and the 50-year decreased 7.7bp to 4.461%.
The 3-year treasury futures surged 28 ticks to 102.88, with approximately 142,000 contracts traded and open interest declining by roughly 4,900 contracts. The 10-year futures jumped 97 ticks to 105.17, with about 83,000 contracts traded and open interest increasing by 1,100 contracts.
Trump Halts Iran Airstrikes as Ceasefire Dialogue Progresses
The Seoul bond market opened strong, influenced by the warming reconciliation atmosphere between the United States and Iran. President Donald Trump reportedly ordered a halt to airstrikes against Iran on May 24 after receiving briefing on the attack plan from US military officials but declining to approve it.
Trump told reporters at the White House that 'serious dialogue' was in progress. That same evening at the White House Correspondents' Association event, he stated, 'I am willing to listen' to Iranian proposals. Following this development, WTI crude for September delivery fell approximately 5% on May 27 after declining 3.12% in the previous trading session.
The drop in international oil prices created favorable conditions across bond markets, with US Treasuries and other Asian government bond yields declining in tandem with Seoul's market. Australia and New Zealand 2-year government bond yields plunged 8bp and 10bp respectively.
Foreign Investors Net Buy 29,000 Three-Year Futures Contracts
Foreign investors net purchased approximately 29,000 three-year bond futures contracts, the highest level since March 31 last year when they bought roughly 33,000 contracts. Financial investment firms sold about 17,000 contracts. In the 10-year futures market, foreigners bought approximately 6,400 contracts while financial investment firms sold around 4,200 contracts.
The dollar-won exchange rate rebounded on perceptions that recent declines had been rapid, but the impact on the bond market remained limited. The KOSPI showed high volatility with repeated fluctuations. Despite risk appetite from ceasefire prospects, bonds outperformed stocks as persistent semiconductor industry peak concerns constrained equity strength.
Considering similar trends in Australia and New Zealand, ceasefire expectations appeared to work positively for oil-importing nations. President Lee Jae-myung stated that the petroleum maximum price system would continue until oil price instability was clearly resolved. The absence of treasury auctions this week also served as a favorable factor for supply conditions.
Market Participants Monitor Oil Prices and Middle East Developments
Bond market participants stated that monitoring Middle East war-related news and international oil price trends was necessary. A bond manager at an asset management firm said, 'The market seems to be moving significantly according to international oil prices,' adding, 'Uncertainty is so high that predictions are not easy.'
A bond dealer at a securities firm explained, 'There are expectations for WGBI fund inflows in the latter half of the week, and foreigners continue to buy treasury futures,' noting, 'Interest rates are still at high levels, but there is still time until the FOMC and treasury issuance plan announcements.'
FAQ
What caused Korean government bond yields to plunge on May 27?
Yields fell sharply following reports that US President Donald Trump halted planned airstrikes against Iran on May 24 and stated that 'serious dialogue' was underway regarding ceasefire negotiations. This development drove international crude oil prices down approximately 5% on May 27, creating favorable conditions for oil-importing nations' bond markets.
How much did foreign investors buy in Korean bond futures on May 27?
Foreign investors net purchased approximately 29,000 three-year treasury futures contracts on May 27, the highest level since March 31 last year when they bought roughly 33,000 contracts. In the 10-year futures market, foreigners bought approximately 6,400 contracts.
What are market participants watching for bond market direction?
Bond market participants stated they are monitoring Middle East war-related news and international oil price trends. A securities firm bond dealer noted expectations for WGBI fund inflows in the latter half of the week and highlighted that time remains until the FOMC and treasury issuance plan announcements.
