[Good Morning Stock Market] U.S. Markets Shaken by 'Rates and Oil'... KOSPI Expected to Open Lower

Crude Oil Surpasses $100 Per Barrel
10-Year U.S. Treasury Yield Hits Three-Year High

As the U.S. stock markets weakened due to rising international oil prices and government bond yields, the domestic stock market is also expected to open lower on September 11 amid macroeconomic uncertainty.

On September 10 (local time) at the New York Stock Exchange, the Dow Jones Industrial Average closed at 52,064.10, down 0.60% from the previous session. The S&P 500 fell 0.58% to 7,591.70, while the Nasdaq dropped 0.65% to 26,081.73.

The KOSPI index opened at 6654.36, up 74.88 points from the previous trading day. On September 4, 2026, the current status of the domestic stock market was displayed on the electronic board in the dealing room at the headquarters of Hana Bank in Jung-gu, Seoul. Photo by Kang Jinhyung

This downturn is interpreted as a result of a surge in international oil prices and government bond yields, prompting sell-offs, especially in semiconductor-related stocks. Due to concerns over Saudi Arabia’s reduced crude oil production in August and potential disruptions in Middle Eastern shipping, West Texas Intermediate (WTI) crude oil jumped more than 6%, exceeding $100 per barrel. Brent crude also rose 6.34% to close at $107.63 per barrel.

In the bond market, yields on 10-year U.S. Treasury bonds climbed as high as 4.857% during the session, reaching the highest level since November 2023. Analysts noted that the U.S. Treasury Department’s bond buyback was also smaller than market expectations. Suh Sangyeong, a researcher at Mirae Asset Securities, explained, "News that the buyback amounted to $5.19 billion, not the initially reported $6 billion, further fueled the rise in bond yields, adding pressure that led to a decline in the index."

There are also calls to pay attention to the U.S. Consumer Price Index (CPI) for August, which is to be announced on September 11 (local time), ahead of next week’s Federal Open Market Committee (FOMC). Han Jiyoung, a researcher at Kiwoom Securities, said, "It is important to note that as oil and 10-year bond yields have surged recently, the market’s actual CPI expectations have risen as well. Even if the August CPI simply meets market expectations, it may provide a sense of relief to the stock market."

Due to macroeconomic factors and weakness in the U.S. stock market, the KOSPI is also expected to start lower on September 11. Han also stated, "The domestic stock market is likely to open lower, impacted by concerns over higher interest rates and oil prices, macro uncertainties—including caution ahead of the U.S. August CPI—and a roughly 3% decline in KOSPI overnight futures."

However, Oracle, which announced its earnings after the market closed, showed an upward trend in after-hours trading, which could act as a buffer. Oracle posted quarterly revenue of $19.3 billion, exceeding market expectations, and also raised its annual revenue guidance to $90 billion. Han added, "Oracle’s strong earnings may help trim intraday losses in the domestic stock market today."

This content was produced with the assistance of AI translation services.