Lead
Seoul stocks surged more than 8 percent on Wednesday, posting their second-largest gain on record, as investors grew hopeful that the U.S.-Iran conflict could end soon. The benchmark Korea Composite Stock Price Index (KOSPI) rose 426.24 points, or 8.44 percent, to close at 5,478.7, snapping a four-day losing streak, according to Yonhap News Agency.
The rally came after U.S. President Donald Trump said Tuesday that the United States could end its military operation against Iran within "two or three weeks," adding, "All I have to do is leave Iran." Iranian President Masoud Pezeshkian also told European Council President Antonio Costa that Tehran has the "necessary will" to end the war, provided its adversaries guarantee it will not reignite, according to foreign media reports cited by Yonhap.
Coverage Comparison
All four reports from Yonhap News Agency, South Korea's leading wire service, framed the rally as a direct response to hopes for a de-escalation of the U.S.-Iran conflict. Three of the four reports carried the same final figures—KOSPI up 426.24 points, or 8.44 percent, to 5,478.7—while a fourth, published mid-session, recorded a rise of 331.93 points, or 6.57 percent, to 5,384.39 as of 11:20 a.m. The discrepancy reflects the intraday timing of that report, not a difference in underlying data.
All reports also noted that the Korean won strengthened sharply against the U.S. dollar, though none provided specific exchange-rate figures. The four reports were consistent in attributing the market move to Trump's statement and Pezeshkian's remarks, which were reported by multiple outlets.
Key Claims
KOSPI surge: The benchmark index rose 426.24 points, or 8.44 percent, to 5,478.7, according to three of the four reports. The gain was the second-largest ever, with the largest recorded on March 5 when the index jumped 490.36 points.
Market breadth and volume: Trade volume was moderate at 942.93 million shares worth 27.31 trillion won (US$18.19 billion), with winners outnumbering losers 837 to 70, as reported by Yonhap. Foreigners and retail investors sold a net 612.61 billion won and 3.76 trillion won worth of shares, respectively, while institutions purchased a net 4.03 trillion won.
Trading halts: The Korea Exchange activated a five-minute buy-side sidecar about seven minutes after the opening bell, temporarily halting program-driven buy orders in KOSPI futures. A buy-side sidecar was also triggered on the KOSDAQ market, which finished 6.06 percent higher at 1,116.18.
Conflict context: The conflict began in late February following U.S.-Israeli strikes on Iran, according to one of the reports. The crisis has driven up global oil prices amid supply disruptions, rattling financial markets and fueling concerns over inflation and a potential economic slowdown.
Prior market decline: The KOSPI fell 19.1 percent from its recent peak in the first week of March, as reported by a single Yonhap article. This figure, though not repeated elsewhere, highlights the extent of the previous selloff.
Other factors: One report noted that optimism over South Korea's inclusion in the World Government Bond Index (WGBI) boosted investor sentiment, and that bond prices closed higher. These observations were not included in all reports, but were not contradicted by any.
Perspectives
Investor optimism: The market rally suggests investors are betting on a swift de-escalation of the U.S.-Iran conflict, particularly after Trump's timeline of "two or three weeks" and Pezeshkian's stated willingness to end the war. The strong gains in tech, auto, and defense stocks indicate broad-based buying.
Cautious outlook: Despite the surge, some analysts may note that the conflict remains unresolved and that volatility could return if diplomatic efforts falter. The previous sharp decline—19.1 percent from peak to trough—underscores how quickly sentiment can shift.
Regional impact: The conflict has had global economic repercussions, including higher oil prices and inflation concerns, which have weighed on markets worldwide. A resolution would likely ease these pressures, but uncertainty remains about the durability of any agreement.