The technology sector's commanding grip on global financial markets is showing signs of strain as a broad pullback from semiconductor stocks and other artificial intelligence-focused equities gained pace this week, marking the most significant reversal since the AI boom began captivating investors earlier this year. The Philadelphia SE Semiconductor Index slumped 11 per cent over the course of the week, positioning it for its worst weekly performance since March 2025 and bringing the index down nearly 24 per cent from its all-time peak in late June. Should current price levels hold, the gauge is on track to formally confirm a bear market, representing a sharp turnaround from gains that had accumulated to nearly 60 per cent across the full calendar year.
The weakness rippled across stock markets from Seoul to major European exchanges as institutional and retail investors alike stepped back from technology equities that had become the primary engine driving portfolio performance throughout much of 2024. Industry heavyweights felt the pressure acutely, with Nvidia's shares declining 3.4 per cent, Advanced Micro Devices falling 4.9 per cent, and Applied Materials dropping 6.5 per cent. Memory chip manufacturers, which had previously attracted considerable investor enthusiasm, also retreated, with both Micron and SanDisk shedding approximately 1 per cent each. South Korea's SK Hynix, a globally significant memory chip producer, saw its American-traded shares initially fall below their initial public offering price before recovering to finish 4 per cent higher, though the stock remains down more than 5 per cent for the week.
Analysts and investment professionals have attributed the sharp reversal to a combination of profit-taking and deepening questions about the pace and scale of returns likely to materialise from the enormous capital expenditure programmes undertaken by major American technology companies in pursuit of artificial intelligence development. Toni Meadows, head of investment at BRI Wealth Management, noted that semiconductor valuations had effectively priced in near-perfect demand scenarios, a particularly precarious position given that chipmaking has historically operated as a cyclical industry prone to boom-and-bust dynamics. This assessment underscores a fundamental concern among market observers: that investor enthusiasm had outpaced the underlying fundamentals, leaving equities vulnerable to even modest shifts in sentiment during what had been a remarkably rapid ascent.
The timing of the selloff coincided with fresh questions about the competitive landscape and execution timelines for artificial intelligence development. Chinese artificial intelligence startup Moonshot unveiled Kimi K3, a large language model with 2.8 trillion parameters that the company claims represents the world's largest open-weight artificial intelligence system. The announcement highlighted concerns that substantial returns on the massive investments already committed by American technology corporations may face serious competition from unexpected quarters. Meanwhile, reporting from industry observers indicated that Alphabet's Google faces schedule delays of several months on the release of Gemini 3.5 Pro, its most advanced proprietary artificial intelligence model, adding another layer of uncertainty about near-term competitive positioning and technological progress.
The semiconductor downturn occurred within a broader context of market turbulence affecting technology sectors globally. South Korea's KOSPI index formally entered bear market territory last week, though the benchmark remains substantially elevated for the year with gains approaching 62 per cent. Japan's Nikkei 225 index tumbled into correction territory on Friday, extending what had been a volatile start to July across multiple major exchanges. Europe's technology sector, which had recorded its most substantial quarterly performance since 2001 during the month of June, emerged as one of the week's poorest sectoral performers, suggesting that enthusiasm for the technology-driven rally is cooling across geographic markets.
The momentum-driven trade that has characterised much of 2024's stock market performance shows clear signs of losing its dominance. The S&P 500 Momentum Index, which had outperformed the broader S&P 500 benchmark by more than a two-to-one margin through the first half of the year, has declined 10 per cent during July alone, contrasting sharply with a decline of only 0.8 per cent for the wider market. This pattern suggests that investors are rotating capital away from the concentrated exposure to artificial intelligence and momentum-driven strategies that had generated extraordinary returns but now appear subject to meaningful reconsideration.
Notably, positive corporate guidance from industry leaders proved insufficient to reverse the week's negative trajectory. Taiwan Semiconductor Manufacturing Company, the world's largest contract chipmaker and a crucial supplier to artificial intelligence accelerator manufacturers, provided strong forward guidance, while ASML, Europe's dominant semiconductor equipment manufacturer, similarly delivered positive assessments. Yet these encouraging signals from companies with deep visibility into industry trends failed to arrest the broader sell-off, suggesting that investor concerns transcend individual company prospects and instead reflect doubts about the aggregate sustainability of artificial intelligence capex cycles and eventual returns on capital deployment.
The weakness extended beyond pure semiconductor equities to encompass related sectors that had benefited from enthusiasm about technology-driven economic transformation. Space-focused companies retreated following a particularly volatile week for SpaceX, which experienced a last-second abort of Starship's 13th integrated flight test. SpaceX shares fell 4.5 per cent following the launch abort and after having slipped below the $135 per share price at which the company's shares had been made available to public investors earlier in the week. The broader space sector, which had rallied substantially earlier in 2024 in anticipation of benefits from SpaceX's public listing, showed additional weakness as Intuitive Machines declined 1.6 per cent and Virgin Galactic lost 2.3 per cent on Friday, with both poised to record losses for the week.
Market participants are now focusing attention on upcoming corporate earnings announcements from major technology companies that will provide clearer visibility into capital allocation plans and competitive positioning. Alphabet and Tesla, both members of the so-called Magnificent Seven group of mega-capitalisation stocks that have driven much of the year's gains, are scheduled to announce quarterly earnings results next week, alongside Intel, the legacy chipmaker facing its own competitive challenges. These earnings reports will offer investors concrete data points on which to reassess valuations and growth prospects for technology equities, potentially determining whether the current pullback represents a temporary pause in a sustained uptrend or the beginning of a more substantive repricing of the artificial intelligence opportunity.
