- The Kospi closed at 2,847.3 on July 22, 2026, up 5.01%, clawing back roughly half of the prior week's 9% AI-selloff drop
- Samsung Electronics rose 7.8% to ₩82,400 and SK Hynix gained 6-8%, per Korea Exchange data, as trading volume hit ₩18.7 trillion — 40% above the recent average
- Taiwan's TAIEX climbed 4.2% with TSMC up 5.7% in a sympathy trade (a related stock moving on another company's news, not its own)
- Bloomberg reports Samsung's HBM chip orders from major AI customers remain at record levels, while Reuters ties the bounce more to oversold technical conditions
What Happened
2,847.3. That's where the Kospi settled on July 22, 2026, a 5.01% single-day jump that erased close to half of the previous week's 9% slide, according to Korea Exchange data. According to Google News, the rally was driven by a broad rebound in Asian chipmakers after a rough stretch triggered by fears that hyperscalers — the giant cloud companies renting out AI computing power — might slow down their AI infrastructure spending.
Samsung Electronics led the charge, up 7.8% to ₩82,400, with SK Hynix posting gains in the 6-8% range. The move wasn't confined to Korea: Taiwan's TAIEX rose 4.2%, with TSMC climbing 5.7% in what traders call a sympathy trade — when one company's stock moves in step with another's news even though nothing changed at the first company itself. Trading volume on the Korea Exchange reached ₩18.7 trillion, 40% above the recent average, a sign that a lot of money moved back into chip names in a single session.
Why It Matters for Your Investment Portfolio
In plain terms, this whole episode is a case study in how sentiment, not just fundamentals, can swing a stock 5-9% in either direction within a week. Bloomberg reported that Samsung's high-bandwidth memory (HBM — the specialized memory chips that feed data to AI processors) orders from major AI customers remain at record levels, directly contradicting the slowdown narrative that sparked the initial selloff. Reuters, meanwhile, cited Korea Exchange data showing foreign investors were net buyers of ₩2.1 trillion in chip stocks on the day, framing the bounce as bargain hunting on oversold conditions (when a stock falls further than its underlying business performance justifies).
The two takes aren't contradictory so much as complementary — strong demand data gave investors a reason to buy, and oversold pricing gave them a good entry point to do it. The Financial Times added a third layer, noting institutional investors and hedge funds increased their long positions (bets that a stock's price will rise) during the dip, treating the selloff as a buying opportunity rather than a warning sign. Nikkei Asia reported that South Korean Finance Ministry officials held emergency meetings with chip executives to gauge the volatility's impact, which suggests policymakers were watching closely even if they didn't directly move the market.
Chart: July 22, 2026 single-day gains — Kospi, Samsung Electronics, TAIEX, and TSMC. Source: Korea Exchange, Bloomberg, Reuters.
For a 30-year-old with a broad index fund tracking Korean or Taiwanese markets, the math works out to a meaningful one-day bounce in portfolio value — but it also underlines how concentrated these indexes are in a handful of chip names. When Samsung and TSMC move 5-8% in a day, the whole index feels it.
Photo by Maxence Pira on Unsplash
The AI Angle
The entire selloff-and-rebound cycle traces back to one question: are AI hyperscalers still spending on infrastructure? Samsung and SK Hynix are critical suppliers of HBM chips essential for AI training, which makes their stock prices a real-time barometer of AI capex (capital expenditure — money companies spend on physical infrastructure like data centers and chips) sentiment. South Korea's government reinforced that bet on July 20, announcing a ₩26 trillion semiconductor support package aimed at boosting domestic chip competitiveness. Nvidia shares recovered 4.3% in U.S. premarket trading following the Asian session rally, showing the sentiment shift rippled well beyond Korea.
What Should You Do? 3 Action Steps
If your investment portfolio includes Korea- or Taiwan-focused funds, look up how much weight Samsung, SK Hynix, or TSMC carry — a handful of names can drive most of the index's daily swing.
KB Securities analyst Park Min-su called the prior week's drop an overreaction, noting hyperscalers remain committed to infrastructure buildout through 2027 — a reminder to check earnings guidance before reacting to a single volatile week.
Portfolio-tracking apps and AI investing tools that flag unusual volume (like the ₩18.7 trillion seen on July 22) can help you spot when a move is driven by fundamentals versus a broad sentiment swing.
Frequently Asked Questions
Why did Kospi fall last week?
The Kospi fell roughly 9% amid fears that major cloud providers might slow AI infrastructure spending, which hit chipmakers like Samsung and SK Hynix hardest given their reliance on AI-related chip demand.
What caused the AI chip selloff?
Reports suggesting some cloud providers might moderate AI data center spending spooked investors, since Asian chipmakers are deeply tied to AI hardware demand through HBM chip production.
Is Samsung stock a good buy after the rebound?
This article does not offer investment advice. Bloomberg noted Samsung's HBM orders from major AI customers remain at record levels, while Reuters attributed the bounce partly to oversold technical conditions — a mixed but constructive signal worth researching further before any decision.
How does AI spending affect Korean chipmakers?
Samsung and SK Hynix supply high-bandwidth memory chips essential for AI training, so any shift — real or rumored — in hyperscaler AI capex tends to move their stock prices directly.
Will semiconductor stocks continue to recover?
Analysts including Mirae Asset Securities' Lee Jae-won argue the sector was oversold relative to its structural role in the AI supply chain. On balance, our analysis of the diverging Bloomberg, Reuters, and FT accounts suggests the rebound reflects both fundamental demand and technical bargain-hunting — but no source guarantees the recovery holds, and readers should track upcoming hyperscaler earnings guidance rather than assume a straight line up.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Research based on publicly available sources current as of July 22, 2026.