Pomegra
KOSPI fell as much as 5% on Nov 5 as SK Hynix and Samsung dropped 7-9% on fears a Democratic Congress will curb US data-center construction and permitting.
- The KOSPI opened down 1.8% at 5,580.09, then fell more than 3% by mid-morning and as much as 5% in early trading.
- SK Hynix and Samsung Electronics fell 7-9% as foreign investors sold more than 860 billion won of Korean shares.
- Wall Street rallied while the Philadelphia Semiconductor Index lost 3.1% to a six-month low.
Lead
South Korea's benchmark KOSPI index plunged as much as 5% in early trading on Thursday, Nov 5, led by steep losses in the country's two largest memory chipmakers. SK Hynix and Samsung Electronics fell 7-9%. Investors are repricing AI stocks after Democrats won control of both chambers of the US Congress in Tuesday's midterm elections. The move raised the prospect of tighter limits on data-center construction, the main source of demand for advanced memory.
What Happened to the KOSPI?
The KOSPI fell sharply from the open and kept falling through the morning session. The index opened at 5,580.09, down 103.71 points from Wednesday's close of 5,683.80. The decline widened to more than 3% by 10 a.m. Seoul time, pushing the index into the 5,500 range, and reached about 5% at the intraday low.
Semiconductors drove the drop. Samsung Electronics was down more than 5% at one point in the morning and extended losses to the 7-9% range, while SK Hynix fell more than 7% early and sank further. Foreign investors were net sellers of more than 860 billion won by mid-morning. Retail investors bought about 720 billion won and institutions about 100 billion won.
The selloff was narrow. Samsung Biologics, Hyundai Motor and KB Financial gained 1% to 4%, following the rotation seen in US trading toward financials, autos and healthcare.
Why Are Chip Stocks Falling After the Midterms?
Chip stocks are falling because a Democratic Congress is expected to scrutinize AI infrastructure more closely, particularly the approval of new data centers and their electricity and water use. Data centers are the largest buyer of high-bandwidth memory, the specialized chips that SK Hynix and Samsung supply to AI accelerator makers.
Texas sharpened the concern. Democrat Gina Hinojosa defeated Republican Governor Greg Abbott after campaigning for a moratorium on new data centers in the state. Texas accounts for roughly 25% of planned US data-center capacity through 2030, and about 13 gigawatts of projects are exposed.
Any federal rules would still need passage through Congress, a presidential signature and state-level enforcement. Markets nonetheless moved to price in slower construction, higher permitting costs and longer project timelines.
How Did US Markets and Chip Stocks React?
US equities rose broadly on Wednesday while semiconductor shares fell. The Dow Jones Industrial Average gained 3.03%, the S&P 500 rose 1.58% and the Nasdaq Composite added 1.44%. The Philadelphia Semiconductor Index fell 3.13%.
- Nvidia (NVDA) fell 3.17%.
- Micron Technology (MU) lost 7.00%, and Micron Technology stock was among the weakest large-cap chip names.
- SanDisk (SNDK) dropped 7.91%.
- Intel (INTC) declined 3.77%.
- Taiwan Semiconductor Manufacturing (TSM) fell 2.24%.
- Broadcom (AVGO) slipped 2.00%.
Companies tied directly to data-center buildouts fell harder. Vistra (VST) dropped about 14% and Vertiv (VRT) about 13%. Chipmakers fell less because their products are sold globally, and a project blocked in one state can move elsewhere and still buy the same processors.
What Comes Next for Korean Chip Stocks?
Korean chip stocks now depend on how quickly Washington moves from campaign positions to legislation. Some investors had put the odds of a Democratic outcome above 60% before the vote, which suggests part of the move reflects positioning as well as new information. The new Congress is not seated until January, so no federal measure can take effect before then.
The nearer-term test is state action. A Texas moratorium would be the first concrete restriction on a market that has absorbed a large share of hyperscaler capital spending. Earnings guidance from US cloud companies and memory suppliers in the coming weeks will show whether AI infrastructure budgets are changing.
Outlook
The KOSPI's early drop of up to 5% reflects concentrated exposure to memory chips and to US data-center demand. The sector fell on regulatory risk, not on any change in orders or earnings. The direction of chip shares now depends on whether the Democratic Congress turns its focus on AI infrastructure into binding permitting and energy rules, and whether Texas follows through on its moratorium pledge.
Mentioned tickers: NVDA, MU, SNDK, INTC, TSM, AVGO, VST, VRT
