Seoul shares trim earlier gains late Tue. morning as investors lock in gains - Yonhap News Agency

SEOUL, Aug. 18 (Yonhap) -- Seoul shares trimmed earlier gains late Tuesday morning on profit-taking amid fading hopes for a deal to end the war between the United States and Iran.

After opening 2 percent higher, the benchmark Korea Composite Stock Price Index (KOSPI) pared its gains to trade 48.32 points, or 0.69 percent, higher at 7,026.26 as of 11:20 a.m.

Retail investors and institutions sold a net 804.7 billion won (US$570 million) and 219.9 billion won worth of stocks, respectively, while foreigners bought a net 1.07 trillion won.

Overnight, the Dow Jones Industrial Average shed 0.51 percent, while the tech-heavy Nasdaq composite declined 0.32 percent.

Elevated oil prices stoked inflation concerns, while prospects for a deal with Iran dimmed after U.S. President Donald Trump said he was not interested in extending an agreement with Iran that was set to expire.

In Seoul, tech stocks continued to lead gains.

Market bellwether Samsung Electronics rose 0.46 percent, and its chipmaking rival SK hynix jumped 4.07 percent.

Leading refiner SK Innovation climbed 3.11 percent, and shipping firm HMM surged 6.12 percent.

Among decliners, top carmaker Hyundai Motor fell 1.77 percent and defense giant Hanwha Aerospace declined 1.55 percent.

The Korean won was trading at 1,411.45 won against the U.S. dollar as of 11:20 a.m., up 4.15 won from the previous stock market session's close.

This photo taken on Aug. 18, 2026, shows the dealing room of Hana Bank in Seoul during morning trading hours. (Yonhap)