KOSPI 5,000 barely holds as battery rout erases a 2% rally

On November 9, 2026, South Korea's benchmark KOSPI climbed as much as 2.24% to 5,172.94 during the session, then reversed to close down 40.84 points (0.81%) at 5,018.85. The index held the KOSPI 5,000 line on a closing basis, but according to Etoday it was the lowest close since February 2 (4,949.67). News1 reported that the KOSPI first closed above 6,000 on February 25, so Monday's close sits roughly 980 points below that mark. Chipmakers edged higher while battery and auto heavyweights sold off, and foreign investors extended their net selling to a seventh straight session.

How did the KOSPI 5,000 line survive on November 9?

The KOSPI opened slightly lower, rallied more than 2% at one point on a chip rebound, and then gave back the entire gain to finish in the red. According to Asia Economy, the index opened at 5,034.20 and touched an intraday low of 4,990.66, briefly slipping below 5,000. Etoday counted 340 gainers and 530 decliners. The KOSDAQ, Korea's second board, also fell 0.82% to 638.97.

Institutions and foreigners traded in opposite directions. Net selling means an investor group sold more shares than it bought. Outlets compiled the figures at different times, so the numbers differ slightly; both sets are shown below.

Either way, foreigners sold roughly 700 billion won, or about $520 million at the day's rate of 1,347.1 won per dollar. Institutional buying of about 720 billion won almost fully offset that, so it is fair to say institutions did much of the work of keeping the index just above 5,000.

Chips rebounded, so why did the KOSPI fall?

The KOSPI fell because chipmakers gave back most of their early gains while battery, auto and biotech heavyweights dropped sharply. According to Etoday, the Philadelphia Semiconductor Index rose 4.20% in the previous U.S. session on November 6, and bargain hunters piled into Korean chip stocks at the open.

Samsung Electronics (KOSPI: 005930) rose as much as 3.55% before closing up 0.64% at 189,900 won. SK hynix (KOSPI: 000660) climbed as much as 5.39% and closed up 0.35% at 1,136,000 won. Etoday noted that the two stocks had fallen 13.44% and 18.91%, respectively, over November 5 and 6.

Sources: closing reports from Etoday, Newspim and Jaekyung Ilbo (Korea Exchange regular-session close, November 9, 2026)

The battery selloff looks more like a reversal of a sharp run-up than a reaction to fresh bad news. According to Aju Business Daily, Samsung SDI jumped 11.57% and LG Energy Solution 5.03% on November 4 on hopes that the Democratic Party's midterm win in the U.S. would bring more support for clean energy. The same report said that on November 9 profit-taking met doubts about whether that policy would turn into actual earnings. Jaekyung Ilbo reported that Samsung SDI had made no disclosure and faced no negative news in the past week that would explain the drop. Sector flows, not company fundamentals, moved the stock.

Lee Kyung-min, an analyst at Daishin Securities (KOSPI: 003540), told Newspim the market was "differentiated by sector," with chips rebounding on bargain buying while other groups stayed weak. Asia Economy data showed the securities sector down 3.99%, one of the steepest declines.

Why have foreigners sold for seven straight sessions?

Foreign net selling began on October 30 and swelled on November 5 and 6 as worries spread about tighter AI data center regulation after the U.S. midterm elections. According to Global Economic, foreigners sold more than 12 trillion won (roughly $8.9 billion) of KOSPI shares over the seven sessions through November 9.

Investors read the election result as a sign that building data centers in the U.S. would become harder and more expensive, which fed concerns about chip demand. We covered that background in why the Nasdaq fell 5.5% after the Democrats' sweep. According to Yonhap, foreign net selling has continued since October 30; daily figures are in the table below.

Gist 7's take: what matters in this table is the intensity of the selling, not its direction. Foreigners are still selling, but the daily amount has shrunk to about a quarter of the November 6 level. Han Ji-young of Kiwoom Securities (KOSPI: 039490) told Global Economic that a repeat of last week's plunge is unlikely unless new macro or AI shocks emerge. Still, foreigners sold even on a day when chips rose, which suggests they are using rebounds to cut exposure rather than to buy back in. We looked separately at how much debt AI companies have taken on in the bond market ahead of CoreWeave's earnings.

Regulators also moved to calm the market. According to Yonhap, at a joint market meeting on November 6 authorities decided to waive brokers' obligation to maintain a 140% collateral ratio on margin loans for three months starting November 9, citing the need to ease volatility. Margin loans let investors buy stocks with money borrowed from a broker. The report did not mention forced liquidations, but a looser collateral rule can be expected to reduce pressure on brokers to sell pledged shares when prices plunge.

The won moved in the opposite direction from foreign equity flows. According to the Korea Economic Daily and Newspim, the won-dollar rate fell 9.5 won to 1,347.1 per dollar as of 3:30 p.m. Seoul time on November 9, meaning the won strengthened. Yonhap reported that the rate had jumped 14.5 won to 1,356.6 on November 6. We found no report directly explaining Monday's move. It may be a partial reversal of last week's spike, but one day is not enough to call a trend. How the currency spike factors into the Bank of Korea's November rate decision is covered in our Bank of Korea rate-hike outlook.

Market impact map

Little direct impact: 2-year Treasury, 10-year Treasury, dollar index, gold, oil (WTI), bitcoin, S&P 500, Nasdaq

• Currency exchange and overseas payments: the won firmed slightly on November 9, but renewed foreign selling could push the won-dollar rate higher again.
• Retirement accounts and funds: products heavy in KOSPI stocks may see wide gaps in returns across sectors.
• Exporters: if the won-dollar rate returns to where it was before last week's spike, exporters' dollar revenue will be worth fewer won.

Market reactions can vary with other factors, and this table is not a basis for investment decisions.

What to watch next

Dates come from official announcements by the U.S. Bureau of Labor Statistics, CoreWeave and Nvidia. Korea Customs usually publishes 10-day export data around the 11th of each month (October's came out on October 12), and the date may change.