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Korea's $60.3 billion chip-export month carried the KOSPI to within 29 points of 7,000
KOSPI rose 1.95% to 6,971.35 on October 1 as Korea's September chip exports hit a record $60.3 billion, reversing a yield-driven early dip. The session shows chip news can beat US rate pressure for a day. How long it can keep doing so depends on how long the memory shortage lasts.
The Investor · Invest desk
What happened
- Micron reported record fiscal fourth-quarter revenue of $54.23 billion and forecast that memory supply and demand will be tighter in 2027 and 2028 than this year.
- The 262.8% year-on-year jump in Korean chip exports came from both higher shipment volumes and rising contract prices.
- Samsung Electronics rose 2.79% to 276,000 won and SK hynix 3.21% to 1.833 million won, after both had fallen more than 1% early in the session.
- The KOSDAQ rose 4.48% to 894.29 for a fifth straight gain, with advancers at 67% of its issues against 57% on the KOSPI.
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Why it matters
- exposure Rising contract prices fed part of the export record. A stall in memory pricing would hit Korea's trade figures and the chip stocks leading the index at the same time.
- constraint Foreign investors finished close to flat across both boards. The session cannot be cited as foreign money coming back to Korean stocks despite higher US yields.
- decision Holders of Korean chip stocks who are setting them against rising US yields are betting on Micron's call for tighter supply in 2027 and 2028, and one strong session cannot confirm a two-year forecast.
Korea's chip exports for September alone exceeded Micron's revenue for its entire June-to-August quarter by about 11% [2]. One is a country's monthly total and the other is one company's three months of sales. The same month a year earlier came to roughly $16.6 billion [3]. The report does not say how much of the jump came from volume and how much from price [13].
The open and the close support different readings. Rising long-term US Treasury yields pushed both indexes down at the start, according to Seoul Economic Daily's market report [3]. The KOSPI opened 0.34% lower at 6,814.49 [2] and closed 156.86 points, or about 2.3%, above that level [6]. Samsung Electronics and SK hynix led the recovery [7]. Lim Jung-eun, an analyst at KB Securities, credited the chip news. "Semiconductor shares rallied as Micron projected that memory supply and demand would be tighter in 2027 and 2028 than this year, while Korean chip exports also hit a record high," Lim said [14]. On that reading, the memory cycle now outweighs rate pressure. A second reading is that October 1 brought Micron's results and a record trade release into the same Korean session [10][12].
Add the main-board flows together and institutions, retail investors and foreigners were net sellers of about 1.63 trillion won [4]. The net buying therefore came from investors outside those three groups. On the KOSDAQ, institutions bought 570.4 billion won and foreigners 327 billion won [6]. Across the two boards, foreigners were net sellers of 9.7 billion won, close to flat [5].
I think the evidence supports the narrow version of the thesis: on October 1, chip news beat whatever pressure came from the Treasury market [3]. The counter-case is Micron's forecast that memory supply and demand will be tighter in 2027 and 2028 than this year [11]. If the shortage runs on that schedule, earnings growth can absorb a higher discount rate for a while. Semiconductor-related names on the KOSDAQ rose faster than the two memory makers, with LEENO Industrial up 10.90% and Wonik IPS up 9.13% [8][7].
The thesis is wrong if sessions that open lower on rising yields start closing lower as well. The KOSPI ended 28.65 points short of 7,000 [1].
What to watch
- Korea's October trade figures, and how much of chip export growth comes from contract prices against shipment volume.
- Whether the KOSPI clears 7,000 on a session when foreign investors are net buyers on the main board.