The South Korean stock market experienced its strongest monthly growth since 1998, propelled by enthusiasm for artificial intelligence and a broadening of investment sectors, despite rising geopolitical risks and oil prices.
South Korea’s Kospi has capped an extraordinary run, posting its strongest monthly advance since January 1998 as investors piled into technology shares and largely looked past heightened tensions in the Middle East. The rally has been powered by enthusiasm around artificial intelligence, with chipmakers SK Hynix and Samsung Electronics doing much of the heavy lifting.
According to CNBC, the benchmark climbed nearly 31% over the month, a move that puts it among the most dramatic bursts in the index’s history. HSBC added to the upbeat tone last week when it lifted South Korea to “neutral” from “underweight”, arguing that recent foreign selling had helped clear out crowded positions and reduced the market’s vulnerability to geopolitical shocks.
The gains have not been confined to semiconductors. HSBC said themes such as energy storage, shipbuilding, defence and nuclear power are also drawing support, suggesting the market’s rebound is being broadened by industrial and strategic sectors as well as the AI trade. That wider participation has helped sustain optimism even as investors have had to navigate a jump in oil prices and uncertainty over the Federal Reserve’s decision to keep rates unchanged.
Still, the advance comes against a volatile backdrop. CNBC reported that Asia-Pacific shares, including the Kospi, fell on Thursday before trimming losses as traders reacted to a four-year high in oil prices, fears of possible US military action against Iran and the Fed’s pause. The contrast underlines how quickly sentiment can shift, even in a market currently being driven by powerful structural themes.
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Source: Noah Wire Services
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The draft above was created using the information available at the time the story first
emerged. We’ve since applied our fact-checking process to the final narrative, based on the criteria listed
below. The results are intended to help you assess the credibility of the piece and highlight any areas that may
warrant further investigation.
Freshness check
Score:
8
Notes:
The article reports on the Kospi index’s performance in April 2026, highlighting a 30.6% gain, the highest since January 1998. Similar reports from reputable sources like ChosunBiz and The Edge Malaysia corroborate this information. However, the article’s reliance on a single source (CNBC) raises concerns about source independence. Additionally, the article includes a source reference map, which may indicate reliance on aggregated content, potentially affecting originality. ([biz.chosun.com](https://biz.chosun.com/en/en-finance/2026/04/21/UJPDRSBXXBHTXC6TP7J2GLQC3M/?outputType=amp&utm_source=openai))
Quotes check
Score:
7
Notes:
The article includes direct quotes attributed to CNBC. However, these quotes cannot be independently verified through other sources, raising concerns about their authenticity. The lack of corroboration from other reputable outlets diminishes the reliability of the information presented.
Source reliability
Score:
6
Notes:
The primary source, CNBC, is a major news organisation, which is a strength. However, the article’s heavy reliance on a single source and the inclusion of a source reference map suggest potential issues with source independence and originality. The presence of aggregated content further complicates the assessment of source reliability.
Plausibility check
Score:
7
Notes:
The reported 30.6% gain in the Kospi index aligns with data from other reputable sources, such as ChosunBiz and The Edge Malaysia. However, the article’s reliance on a single source and the inclusion of a source reference map raise concerns about the originality and independence of the content. The lack of corroboration from multiple independent sources diminishes the overall credibility of the report.
Overall assessment
Verdict (FAIL, OPEN, PASS): FAIL
Confidence (LOW, MEDIUM, HIGH): MEDIUM
Summary:
The article reports on the Kospi index’s performance in April 2026, highlighting a 30.6% gain, the highest since January 1998. While this aligns with data from other reputable sources, the article’s heavy reliance on a single source (CNBC) and the inclusion of a source reference map raise concerns about source independence and originality. The lack of corroboration from multiple independent sources diminishes the overall credibility of the report. Additionally, the inability to independently verify the quotes further undermines the article’s reliability. Given these concerns, the article does not meet the necessary standards for publication under our editorial indemnity.
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