Asian Markets Suffer Steep Losses as Tech Stocks Trigger Circuit Breakers

Tech Sell-Off Sends Asian Markets Into Tailspin

Asian stock markets experienced dramatic declines on Friday as a widespread sell-off in technology shares triggered trading halts and raised fresh questions about the sustainability of recent valuations. South Korea’s Kospi plunged by as much as 9 percent during intraday trading before closing 5.81 percent lower at 8,411.21 points. The sharp decline prompted exchange officials to halt trading temporarily, marking a dramatic reversal for what had been the world’s best performing market this year.

The Kospi triggered its circuit breaker mechanism for the second time this week and the fifth time this year, underscoring heightened volatility in Korean equities. Friday’s 20-minute halt marked the third time the so-called circuit breaker has been triggered this week. After surging 76 percent in 2025, the index has doubled in value so far this year, but the recent pullback signals growing investor unease about stretched valuations in the technology sector.

Major chipmakers bore the brunt of selling pressure, with Samsung Electronics falling 5.3 percent and peer SK Hynix dropping 8.4 percent. The two companies account for more than 50 percent of the benchmark index, amplifying their impact on overall market performance. The sharp declines came as investors questioned whether recent price gains had outpaced fundamentals, particularly given rising component costs and uncertainty about artificial intelligence monetization.

Regional Markets Follow Downward Trajectory

The technology-driven sell-off rippled across Asian trading floors, with major indexes posting substantial losses throughout the region. Japan’s Nikkei 225 closed more than 4 percent lower as shares in technology investment giant SoftBank plummeted 12.5 percent. The decline reflected broader concerns about the sector’s valuation levels following months of aggressive gains driven by artificial intelligence enthusiasm.

In Hong Kong, the Hang Seng Index fell 1.8 percent to 22,671.86 at the close, rounding out a 5.2 percent loss this week-the biggest weekly drop since April 11, 2025. The Hang Seng Tech Index suffered even steeper losses, dropping 3.4 percent as investors reassessed their exposure to high-growth technology companies facing mounting cost pressures and regulatory scrutiny.

On the mainland, technology stocks led the retreat, with the Star Market 50 index tracking Shanghai’s tech board sinking 1.7 percent, and the ChiNext 50 gauge of Shenzhen-listed start-ups tumbling 4.6 percent. The benchmark CSI 300 Index slid 3 percent, reflecting widespread concern about earnings prospects amid China’s fragile consumer confidence. Taiwan’s Taiex also suffered, sinking 3.6 percent as chipmaker-heavy indexes faced renewed selling pressure.

Price Increases Spark Valuation Concerns

The Asian market turmoil followed sharp declines in U.S. technology shares on Thursday, which reversed early gains to end lower as investors worried about hyperscaler spending on AI and who would ultimately bear those costs. Apple shares dropped by 6 percent-its biggest one-day fall in more than a year-after the company announced it would raise prices for its iPads and MacBooks due to soaring computer chip costs.

Microsoft shares also fell after the company announced higher prices for its Xbox gaming consoles, citing increased component expenses. The moves raised concerns that rising prices could dampen consumer demand for devices, which in turn may slow sales of computer chips. Traders are now reassessing technology stock valuations while some take profits after a months-long rally, said senior partner David Makaryan from Alpha Pacific Group, an investment firm.

“The long term investment case for AI remains compelling, but investors are becoming far more selective about which companies can justify the valuations the market has assigned to them,” Makaryan said.

Leverage Unwind Amplifies Market Swings

Signs of an unwinding of record-high leveraged bets on AI stocks in South Korea and Taiwan, which are heavily weighted toward chipmakers, further soured sentiment in Asian trading. Increased participation by investors taking out loans to buy stocks amplifies swings in the two markets, creating a fresh headwind for the AI trade. The Kospi posted a weekly drop of 7.1 percent, the biggest decline since early March when the Iran war hit global financial markets.

Market analysts noted that growing doubts about AI-related corporate value and investment demand have weakened sentiment across the sector. An analyst at Kiwoom Securities suggested that today’s slump can be mostly explained by high volatility amid concentration in the chip sector, while worries about memory demand declining may be excessive. The concentration of market capitalization in a handful of technology giants has made indexes particularly vulnerable to sector-specific concerns.

The South Korean won traded 0.7 percent higher on the day at 1,532.0 per dollar on the onshore settlement platform, erasing early losses as traders suspected authorities intervened to defend the 1,550 mark. Currency volatility added another layer of complexity for investors navigating turbulent equity markets.

Investment Focus Shifts From Concept to Execution

The global artificial intelligence trade has stumbled over the past week after rebounding from an oil shock-driven low. The Federal Reserve pivots to a hawkish stance, and investors now demand more evidence of AI monetization that can justify massive capital expenditure. Some investors worry about the hundreds of billions of dollars big tech firms are spending this year to build artificial intelligence infrastructure.

Gary Dugan, CEO of The Global CIO Office, which advises family offices and high-net-worth investors, explained the shifting investment landscape facing technology stocks.

“Investors want AI exposure but are less willing to pay a single multiple for long-duration growth, margin expansion and market leadership simultaneously,” Dugan said. “The trade is shifting from concept to execution. That is a healthy development, but it means dispersion will rise.”

Other major index heavyweights also declined, with battery maker LG Energy Solution down 5.8 percent, while Hyundai Motor and sister automaker Kia Corp dropped 4.5 percent and 3 percent, respectively. The broad-based selling suggests investors are reducing risk across portfolios rather than making selective bets within the technology sector. Samsung Group plans to announce on Monday investment plans totaling 1,000 trillion won in South Korea over ten years, including a potential 300 trillion won to build chip factories in the south-west of the country, according to reports.