The technology sector's extraordinary momentum has hit a significant speed bump, with semiconductor stocks suffering their worst weekly performance in over a year amid growing scepticism about the artificial intelligence narrative that has dominated markets throughout 2024. The pullback, which began this week, represents a crucial turning point for investors who have ridden the AI wave to substantial gains, and raises uncomfortable questions about whether the current valuations can be sustained as the initial euphoria gives way to more sober analysis of returns on massive capital expenditure.
The Philadelphia SE Semiconductor Index has lost 11 per cent in the current week alone, putting it on track for its largest single-week decline since March 2025 if losses hold through the market close. More troublingly for long-term investors, the index has now tumbled nearly a quarter from its peak in late June, confirming a formal entry into bear market territory. This dramatic reversal reflects not merely a correction of excess but a fundamental reappraisal of whether the semiconductor sector can deliver the perfect demand scenario that current stock prices have already incorporated. Toni Meadows, head of investment at BRI Wealth Management, observed that semiconductor valuations had priced in unrealistic growth assumptions for what has historically been a cyclical industry, leaving shares vulnerable once profit-taking began.
The selling pressure extended across the sector's heavyweights. Nvidia, the world's most prominent artificial intelligence beneficiary, declined 3.4 per cent, while Advanced Micro Devices fell 4.9 per cent and Applied Materials shed 6.5 per cent. Memory chip specialists Micron and SanDisk experienced more modest losses of around 1 per cent each, suggesting investors are increasingly discriminating between different segments of the semiconductor industry. South Korean chipmaker SK Hynix's United States-listed shares briefly dipped below their initial public offering price before recovering to close 4 per cent higher, though the stock remained down more than 5 per cent for the week, demonstrating the volatility that characterises the current environment.
The reversal has rippled across Asia-Pacific markets with particular force. Seoul's KOSPI index formally confirmed bear market status last week, a significant development given that the benchmark remains up nearly 62 per cent year-to-date. Japan's Nikkei 225 index tumbled into correction territory on Friday, erasing months of accumulated gains in a matter of days. Europe's technology sector, which had recorded its strongest quarterly performance since 2001 in June, found itself among the week's biggest sectoral losers. The momentum-driven allocation strategy that had privileged mega-cap technology stocks has reversed sharply, with the S&P 500 Momentum Index declining 10 per cent during July whilst the broader market fell just 0.8 per cent, indicating a dramatic unwind of crowded positions.
Several catalysts have prompted this reassessment. Chinese artificial intelligence startup Moonshot unveiled Kimi K3, described as the world's largest open-weight artificial intelligence system at 2.8 trillion parameters, potentially challenging the assumption of durable competitive advantages for Western technology companies investing heavily in artificial intelligence infrastructure. Simultaneously, reporting emerged that Alphabet's Google faces delays of several months in releasing Gemini 3.5 Pro, its flagship artificial intelligence model, raising questions about development timelines and return on investment for the vast capital being deployed. These negative developments struck at the heart of the bull case for semiconductor stocks: that insatiable demand from artificial intelligence would sustain margins and growth for years ahead.
Meanwhile, space-related stocks that had surged earlier in the year in anticipation of commercial benefits from SpaceX's initial public offering also faced headwinds. SpaceX itself declined 4.5 per cent after a last-second abort of Starship's 13th flight test, with the company having already slipped below its $135 per share initial offering price earlier in the week. Intuitive Machines lost 1.6 per cent whilst Virgin Galactic fell 2.3 per cent on Friday, with both positioned to record weekly losses. The setbacks suggest that investors are rotating away from speculative positions across the technology ecosystem.
Remarking on the underlying drivers of the pullback, market participants have pointed to profit-taking after the substantial gains accumulated through the first half of the year. The semiconductor index has nonetheless climbed approximately 60 per cent since January, providing investors with considerable gains to lock in. However, the rotation reflects something deeper than routine profit-taking: a questioning of the investment thesis itself. Semiconductor valuations had assumed a scenario of near-perfect demand growth for what has been a traditionally cyclical industry, vulnerable to supply-demand imbalances and competitive pressures. Once recognition of these historical patterns reasserted itself, the vulnerability of elevated valuations became apparent.
Notably, positive earnings guidance from major industry players failed to arrest the decline. Taiwan's TSMC, the world's largest semiconductor manufacturer, and Netherlands-based ASML, a crucial supplier of semiconductor manufacturing equipment, both delivered strong forecasts, yet their comments made little impact on the negative momentum. This indifference to fundamentally positive data suggests that technical factors—including algorithmic selling, margin calls on leveraged positions, and general portfolio rebalancing—have overwhelmed traditional valuation considerations in driving market direction.
The week ahead will prove consequential for determining whether this pullback represents a temporary correction or the beginning of a more sustained repricing. Earnings announcements from two of Wall Street's "Magnificent Seven" technology giants, Alphabet and Tesla, are scheduled alongside results from semiconductor manufacturer Intel, providing fresh data on the cash flow realities underlying artificial intelligence investments. Investors across Southeast Asia, who have benefited from the technology boom through exposure to regional electronics manufacturers and semiconductor equipment suppliers, will watch these developments closely. Malaysia's substantial role in semiconductor manufacturing and electronics assembly means that the global sector's trajectory directly influences employment, capital flows, and economic growth trajectories across the region.
