Sell-Side Circuit Breaker Triggered as Apple's Memory Shock Sends Kospi Down 8%

Sell-Side Circuit Breaker Triggered, Kospi Plunges Over 8%

The Kospi slid more than 8% intraday, triggering a sell-side circuit breaker. The index briefly fell to around the 8,170 level before paring losses to trade between roughly 8,200 and 8,300, while the Kosdaq dropped 4-5% to around the 848 level. Foreign investors sold more than 3 trillion won worth of Kospi shares, institutions - including the national pension fund - sold alongside them, and the number of advancing stocks across both markets fell short of 200, underscoring how broadly the market contracted.

The trigger was Apple's announcement that it would raise MacBook and iPad prices to reflect rising memory costs. The market read this as a sign that semiconductor suppliers and buyers were beginning to diverge, and the fallout spread beyond Samsung Electronics and SK Hynix to Asian chip-related names including Japan's Kioxia, SoftBank, Advantest, and Murata.

Analysts pointed to the indiscriminate trading structure of index-tracking ETFs and leveraged products as another factor amplifying the decline. When bellwether stocks fall first, the index drops with them, and ETFs that track the index then sell their entire baskets, compounding the decline further - the trigger differs each time, but the same reaction pattern keeps repeating.

Questions were also raised about the national pension fund's trading tactics. Even though the fund has already moved past its rebalancing threshold and selling is unavoidable, critics argued it should be buying on sharp selloff days and trimming on rally days to dampen volatility - but in practice, outsourced asset managers focused on beating return targets appear to be amplifying volatility instead.

National Growth Fund News Backfires for Some Stocks, Cluster Beneficiaries Rally

News that the National Growth Fund would invest in LegoChem Biosciences and LIG Nex1/LIG Defense & Aerospace initially lifted both stocks. But sentiment reversed once details emerged: the investment would take the form of roughly 330 billion won in convertible preferred stock (CPS) issued to Korea Development Bank, Orion Holdings, and a third-party financial investor, and LegoChem Biosciences fell more than 10% to around the 140,000-won level.

Views were split on the roughly 149,300-won conversion price. Some argued a conversion price typically marks a floor investors believe in, which could actually support the stock; but the market instead focused on the fact that the company took on debt-like financing rather than issuing new shares outright, reading it as a cash-flow concern and pushing the price below the conversion level.

Meanwhile, semiconductor equipment and materials stocks extended gains on optimism over the Gwangju-Jeonnam cluster. Tes rose by double-digit percentages, and PSK and Wonik IPS also posted strong gains, while Gwangju Shinsegae and Kumho Group affiliates hit their upper limits and Kumho Tire surged more than 20%, lifting regional stocks broadly.

Still, commentators cautioned that chasing such theme-driven rallies requires discipline: check whether the company is actually profitable, whether its price-to-book ratio (PBR) is low enough to suggest relative undervaluation, and whether its business is directly tied to the cluster investment - and avoid names where the causal link stretches more than two degrees away.

Gwangju-Jeonnam Semiconductor Cluster: Samsung Electronics and SK Hynix Investment Nears

A large-scale semiconductor investment plan for the Honam region is expected to be announced next Monday at a public-private meeting on national land transformation chaired by President Lee Jae-myung. The leading candidate sites are the Cheomdan 3 district, Haenam Solaseado, and the Gwangju airport site, and reports suggest the investment figure to be unveiled could be larger than expected.

Samsung Electronics Chairman Lee Jae-yong reportedly met with the president for more than an hour, and SK Group Chairman Chey Tae-won's side is said to be considering additional green-energy investment, including in power infrastructure. Since equipment orders are typically the first thing placed once a new fab is built, related equipment stocks have already been rallying ahead of the formal announcement.

The investment is also being read as a possible fix for Korean chipmakers' persistently low return on equity (ROE). Rather than simply stockpiling cash, directing it toward domestic investment - and specifically toward the Honam region, which has historically lagged in industrial infrastructure - marks a departure from past regional investments that were often diluted across multiple areas for political reasons. Securing sufficient power and water remains the key constraint for running large-scale fabs, which is part of why coastal locations are seen as advantageous.

Apple's Memory Shock Rattles US Big Tech and Asian Chip Stocks Alike

Apple shares fell about 6% after the company said it would raise MacBook and iPad prices to reflect higher memory costs. The market read this two ways: as a sign that higher prices could dampen consumer demand, and as a signal that memory demand itself might soften.

Micron had earlier posted very strong results, sending its shares sharply higher in Asian trading after the US close, only for the stock to reverse and fall more than 6% in after-hours US trading. This episode is being seen as the first day the gap became visible between chip suppliers, who can keep selling at high prices, and buyers, who have to absorb those costs - and the sharper that divide becomes, the more chip stocks and the big tech names that consume chips could start moving in opposite directions.

As a result, US 'Magnificent Seven' stocks have pulled back by roughly 10% recently, and with earnings from major big tech names - Alphabet on July 22 US time (July 23 in Korea) and Meta on July 29 - still about a month away, related noise could persist until then. On the same day, Japan's Kioxia fell more than 9%, SoftBank more than 12%, Advantest more than 9%, and Murata around 7%, as Asian chip-related stocks broadly sold off in tandem.

National Growth Fund and Balanced Regional Development: A Government-Led Investment Push

The National Growth Fund has begun investing in promising bio and defense companies, effectively giving the government's stamp of approval to specific firms' growth prospects. But as this case showed, when the capital comes in as convertible preferred stock or convertible bonds rather than a straight equity stake, dilution concerns can weigh on the share price instead of lifting it.

The Gwangju-Jeonnam semiconductor cluster is likewise an extension of the government's push for balanced national development. Unlike past regional investments that were often spread thin across multiple areas for political reasons, this time investment is being concentrated in a single strategic industry - semiconductors - which is seen as making it a potentially more effective model for regional development.

Kwangsoo's Take - Why a Semiconductor Boom Feeds Through to Consumption

Semiconductors now account for roughly the high-40% range of Korea's exports, up from about 20% in the past, and make up more than half of the stock market's total capitalization. A strong chip cycle effectively means strong exports, which tends to bring trade surplus headlines and upward revisions to GDP growth forecasts - and indeed, charts of the consumer sentiment index and export growth have tracked each other remarkably closely over time.

Large-scale bonus payouts at chipmakers including SK Hynix are also set to boost household purchasing power. This pattern has repeated with every semiconductor supercycle, which is why improving chip conditions are read as a signal to buy consumption plays, department store stocks in particular.

One notable new variable is foreign tourism. Visitors to Korea reached about 19 million last year, recovering to pre-pandemic levels, and are expected to hit around 23 million this year, with the government targeting 30 million by 2029. Cumulative visitors from January through April this year rose about 21% year-on-year to roughly 6.77 million, while their spending jumped 41% - reflecting both higher volume and higher spending per visitor - and the mix of nationalities is diversifying, with China and Japan now accounting for under half of total visitors combined.

Sidong's Take - Apple and Nokia: No Number One Lasts Forever

Apple's operating margin, around 10% in 2005, climbed sharply after the iPhone launched in 2007 and has stayed in the 30% range for more than 15 years since. This latest price hike, driven by rising memory costs, raises the question of whether that streak can continue.

Nokia, the dominant force in mobile phones before the iPhone, once posted operating margins in the 20% range too, but it fell behind during the shift to smartphones and was ultimately pushed out of the market. The two reasons often cited for Apple's cautious approach to AI investment - that AI models will become commoditized so there's no need to build its own, and that it would rather wait for the bubble to pop and buy in cheap - bear an uncanny resemblance to the stance Nokia once took toward smartphones.

Microsoft, Meta, Oracle, and Alphabet, by contrast, are aggressively ramping up AI investment, even issuing corporate bonds and raising equity to fund it. No company or industry stays on top forever, which is a reason for investors to pay attention to companies that adapt flexibly to change - and it's also why Korean companies moving preemptively, as with the Honam semiconductor investment, deserve a more confident read.