KOSPI crashes 10%, Magnificent Seven slump deepens

After eight days of record gains, memory‑chip leaders Samsung and SK Hynix tumbled more than 12%, pulling the KOSPI down 10% and activating a 20‑minute circuit‑breaker halt. The sell‑off exposes how the AI‑driven rally has left the Korean market overly concentrated and vulnerable to rapid sentiment swings.

Last week the S&P 500 lagged its equal‑weight counterpart by 350 bps as the Magnificent Seven fell sharply, delivering the fourth‑worst momentum drawdown in 22 years. Historical patterns suggest a roughly 70 % probability of a bounce‑back, meaning investors could see a quick recovery if the tech giants rebound.

Margin debt surged 8.5% in May to a record $1.42 trillion, a 53.7% year‑over‑year jump, as the S&P 500 continued its rally. The spike signals mounting speculation and leaves the market more vulnerable to swings if borrowing costs rise.

In just a year, about two dozen autocallable ETFs have amassed $2.5 billion, driven by advisors seeking simpler, ETF‑wrapped exposure to structured notes. The flagship Calamos Autocallable Income ETF alone holds $1 billion, signalling a shift toward more liquid, retail‑friendly structured‑product strategies.

The Fed’s decision to drop forward guidance and omit the dot‑plot adds an uncertainty premium to MBS markets, pushing Treasury yields higher and nudging mortgage spreads upward. Lenders may face a few extra basis points on rates as investors price in volatility from the Fed’s quieter communication.

In its 2024 Annual Economic Report, the Bank for International Settlements says the AI boom, fuelled by debt‑heavy hedge‑fund and private‑credit financing, creates a systemic risk that could tumble equity valuations and tighten credit conditions worldwide. A sharp pullback would hit tech‑heavy stocks and spill over into the broader economy.

South Korea’s Samsung and SK Hynix are set to announce up to 2,000 trillion won ($1.3 trillion) in investment over the next decade. Each will build four to five fabs in the Gwangju region, with Samsung adding packaging plants and SK Hynix expanding NAND capacity. The spending aims to cement the country’s AI and chip leadership.

Regan, barred from the securities industry, sold “guaranteed” 10‑15% returns through Next Level and Yield, then used later investors’ money to pay earlier ones. He recorded dozens of sales pitches and shared them with his agents, exposing the exact scripts and psychological tricks he used to dupe over 300 investors out of $50 million.

At its annual shareholder meeting, Jensen Huang declared that any commercial deal that conflicts with U.S. national‑security concerns will be rejected, even if it means foregoing revenue from China. He warned that smuggled AI chips are a dead end, underscoring Nvidia’s commitment to strict export compliance.

At its Investor Day, Qualcomm unveiled a full‑stack data‑center roadmap centered on the High‑Bandwidth Compute (HBC) architecture and the Dragonfly C1000 CPU. The move targets the $15 billion AI‑infrastructure market by 2029, positioning the chipmaker beyond mobile into enterprise AI workloads.

22V Research flags ten mainland‑China listed firms that supply everything from printed‑circuit boards to optical fiber for U.S. data centers. Their market caps have doubled this year, driving a surge in Chinese export value and exposing U.S. AI infrastructure to supply‑chain dependence.