In early trading on October 15, 2026, South Korea’s KOSPI opened down **5.59%**, fell nearly **6%** intraday, and briefly dropped below **5,700 points**, its lowest level in nearly three months. This means the global sell-off has now directly battered Asia-Pacific markets.

At 9:07 a.m., the Korea Exchange triggered a sell-side circuit breaker (sidecar), pausing programmatic sell orders for **5 minutes**. The KOSPI has now fallen for **seven consecutive trading days**, its longest losing streak in nearly two years. This suggests institutional funds are fleeing at any cost, with panic selling forcing the trading system to cool down.

Note the distinction: This is the second wave after the plunge triggered by the memory chip breakthrough news on October 13. The drivers are entirely different this time—the expectation of rate hikes combined with AI financing difficulties. The underlying dynamics have completely changed.

**Key data: The AI spending spree is facing a reckoning**

Chips took the hardest hit: Samsung Electronics fell more than **7%**, SK Hynix dropped over **8%**, Tokyo-listed Kioxia sank more than **8%**, SoftBank fell about **7%**, and the Nikkei 225 slid more than **3% intraday**. This suggests global investors are dumping the infrastructure underpinning computing power, as confidence in AI hardware begins to waver.

Two factors triggered the sell-off. First, U.S. September CPI rose **3.7%** year over year, above expectations of **3.6%**, prompting markets to bet on a Fed rate hike in October. This points to rising expectations of tighter liquidity, with investors accelerating their retreat from risk assets.

Second, in a report released on October 14, Gartner warned that more than **$3.5 trillion** in AI infrastructure investment could face impairment risks by **2030**, and that over **80%** of emerging cloud providers (neoclouds) may not survive until **2030**. For the first time, an authoritative institution has put a price tag on the AI spending spree: huge investments in computing power may not translate into real revenue.

CoreWeave, singled out in the report, plunged **15.46%** overnight, and yields on its corporate debt surged to nearly **15%**. Elon Musk replied with just one word: "Yikes." This suggests bond markets are pricing it as a high-risk asset, and the debt-fueled path to building computing capacity may soon run out of road.

**Market and capital impact: Major assets under pressure, while $BNB holds up relatively well**

U.S. stocks also fell overnight: the Nasdaq dropped nearly **2%**, while the S&P 500 lost more than **1%**. This suggests tech stocks are undergoing a broad valuation reset, with risk aversion spreading across the market.

Crypto came under pressure too: Bitcoin is trading at around **$81,500** (down about **2%** in 24 hours), while Ethereum is around **$2,409** (down about **3.9%**). This indicates that amid expectations of macroeconomic liquidity tightening, large investors are prioritizing cutting exposure and moving into U.S. dollar cash.

But the retreat in capital has been uneven. $BNB is trading at around **$727.6** (down about **2.1%**), holding up in line with Bitcoin and clearly outperforming Ethereum. This suggests that during this risk-off period, $BNB is better supported by ecosystem utility and the platform's fundamentals, leaving it with lighter selling pressure.

**Outlook**

This sell-off is essentially the market pricing in expectations of a Fed rate hike in October and the deflation of the AI bubble. Until the rate-hike uncertainty is resolved, volatility linking tech stocks and crypto markets is likely to continue. Don't rush to call a bottom: keep a close eye on macro interest-rate developments and key support levels, and avoid impulsive trades. If you found this breakdown of the underlying dynamics useful, follow along—we'll keep discussing any new market moves.