Summary of Key Points
In July, the South Korean stock market experienced a sharp decline due to "triple leverage" (borrowing from off-exchange sources + on-exchange financing + leveraged ETFs). Tech giants such as Samsung and SK Hynix led the drop. This impact subsequently spread to the semiconductor sectors in the US stock market and the computing power segments in the A-share market, resulting in a "rare resonance" among tech stocks in China, the US, and South Korea. This is a new type of "cross-border risk driven by trading activities," specifically affecting the semiconductor sector and stemming from derivative regulations, with a potentially shorter recovery period. Although the A-share market has rebounded, it is still necessary to monitor indicators such as the clearance of leveraged positions. In the long term, China must enhance its industrial autonomy and upgrade institutional risk management practices to withstand external shocks.
Detailed Analysis
1. How Did the South Korean Stock Market Become the "Eye of the Storm" for Global Tech Stocks?
The South Korean stock market's crisis was mainly caused by two unique factors:
- Overly Concentrated Market Weight: The market value of Samsung and SK Hynix, two leading memory companies, accounts for more than half of the main board market. Their declines had a significant impact on the entire market.
- Triple Leverage: South Korean retail investors used aggressive leverage strategies: they borrowed funds from banks or private sources, then sought financing through securities firms (increasing their exposure further), and finally invested in leveraged ETFs that held twice or three times the value of Samsung and SK Hynix's stocks. This meant that any price drop would double their losses. When prices fell, the leverage mechanism triggered a chain reaction of forced sales, leading to a vicious cycle of declining prices and increased selling.
More importantly, these leveraged ETFs acted as global amplifiers: they transformed the volatility of South Korean memory stocks into a global sentiment indicator for the AI industry. Additionally, daily leverage adjustment rules (such as requiring positions to be adjusted to maintain a two-fold leverage ratio at the close) forced the sale of stocks during declines, exacerbating the overall market downturn.
2. Why Did Tech Stocks in China, the US, and South Korea Decline Synchronously?
In the past, global tech stock declines usually started in the US before spreading to other markets. However, this time was different:
- Deep Industrial Interconnection: Both China and South Korea are key suppliers in the US AI industry chain—South Korea produces memory chips (essential for AI computing power), while China manufactures components like optical modules and PCBs. The performance of Samsung and SK Hynix directly reflected market concerns about the sustainability of AI-related capital spending, which were transmitted to related sectors in the A-share market.
- Unified Narrative around AI: There was a widespread focus on "AI infrastructure development" across global markets, with no regional barriers. When leverage in South Korea collapsed, quantitative funds and pooled investments globally sold their positions simultaneously, causing a collective drop.
- New Type of Risk: Unlike traditional financial crises (e.g., 2008), this was a trading-related issue. The adjustment of leverage regulations in South Korea, combined with the amplifying effect of leveraged ETFs, affected only the semiconductor sector without impacting banks or the real economy, potentially leading to a faster recovery.
3. Has the Danger Passed? A Short-Term Rebound Does Not Equal Stability?
The A-share market has risen by 3% in the past four days, and the STAR 50 index by 4.3%, but institutions believe the risk has not completely subsided:
- Short-term Risk Reduction: The most intense phase of selling from leveraged ETFs in South Korea may have passed, and A-share valuations are relatively low, providing room for a rebound.
- Three Indicators to Monitor:
1. Whether the leveraged funds in South Korea have been fully cleared.
2. The concentration of trading in A-share markets (e.g., whether there is still excessive speculation in certain tech stocks).
3. Financial reports from US cloud companies (e.g., Amazon and Microsoft) on their AI hardware spending.
If cloud companies continue to invest in AI infrastructure, the pressure on global tech stocks will decrease.
- Potential for Further Volatility: Market sentiment remains unstable, and there could be a divergence after the rebound. The long-term stability of the market depends on actual demand and performance in the AI industry (e.g., whether Chinese companies receive more overseas orders for optical modules).
4. How Can the A-share Market Build Resistance to Such Risks?
To counter these cross-border risks, the A-share market can take the following measures:
- Short-Term Strategies: Maintain a balanced portfolio and wait for clearer signals before investing in tech stocks. Consider adding high-dividend defensive sectors (e.g., banks, utilities). Wait for leveraged positions in South Korea to be cleared and for US companies' financial reports to be released before focusing on core AI-related sectors.
- Institutional Risk Management: Fund managers should closely monitor overseas leverage derivatives and avoid investing too much in single tech sectors. Set stop-loss rules for extreme market conditions to prevent reckless selling based on foreign sentiment.
- Long-Term Protection: Enhance industrial autonomy by reducing dependence on foreign markets. This includes developing domestic memory chip production and supporting domestic technology innovation ecosystems, as well as strengthening domestic long-term investors (e.g., social security funds and pension plans) to reduce vulnerability to cross-border quantitative investments.
In Summary
The recent global tech market turmoil was triggered by South Korean leveraged investments that impacted the entire AI sector. While there has been a short-term rebound, ongoing stability depends on improving industrial independence and strengthening risk management. Individual investors should avoid heavily leveraging their portfolios and adopt a more balanced investment strategy.