Nasdaq Sheds 1.5% as Chip Selloff Tests AI Valuations

The Nasdaq Composite fell 1.55% on Monday, while the S&P 500 lost 0.8% and the Dow Jones slipped 0.3%, as a sharp pullback in semiconductor shares put the market's most crowded AI trades under pressure. The PHLX Semiconductor Index tumbled 4.8%, extending a global selloff that began overnight in Asia and signalling that investors are becoming more selective about how much they will pay for future growth after an extraordinary run in technology stocks.

The weakness was broad and brutal within the chip complex. Micron dropped 4.4%, Intel lost 6.1%, and Sandisk plunged 13%, while Marvell and AMD also finished lower. Even SpaceX slid 4.2%, drifting back toward its $135 IPO price. The selling followed a sharp overnight decline in Asia, where SK Hynix and Samsung Electronics sold off heavily, dragging South Korea's Kospi down nearly 9%. The move shows how tightly AI-infrastructure sentiment is linked across global markets, and how quickly a repricing in one region can spill into US trading.

The central question for traders is no longer whether AI demand is structurally real, but whether near-term price already reflects too much optimism. After months of relentless gains, the market is weighing company quality against entry-point quality. A long secular theme can remain intact while momentum, valuation, or positioning turns against it, and Monday's session looked like a test of exactly that distinction rather than a verdict on the business cycle.

Energy added another layer of uncertainty. Oil prices climbed after fresh geopolitical tension over shipping through the Strait of Hormuz, with proposals to charge as much as 20% of cargo value for vessels using the route. Higher oil can feed inflation through transportation and manufacturing costs, making it harder for the Federal Reserve to ease or hold monetary policy. That is one reason equities become nervous whenever energy prices spike: the rate path and the earnings backdrop both move at once.

Attention now shifts to a packed Tuesday. JPMorgan Chase, Goldman Sachs, Bank of America, Wells Fargo, and Citigroup kick off big-bank earnings, giving investors the first read on credit conditions, net interest margins, and corporate guidance for the second half. Bank results often set the tone for broader index sentiment, especially when growth-stock valuations are already under review.

The June CPI report is the other major catalyst. Annual inflation is expected to ease to 3.8% from 4.2%, but the print will be judged against oil-driven inflation risk and the Fed's tolerance for staying restrictive. A softer reading could support a relief move in rate-sensitive technology shares, while a hotter number would likely reinforce the higher-for-longer narrative and keep pressure on high-duration growth.

For NAS100 traders, the useful framework is scenario-based rather than directional. A stabilisation in semiconductor leadership, with the PHLX Semiconductor Index finding support after the 4.8% drop, would suggest the selloff was a positioning reset rather than a trend change. Continued weakness, especially if it spreads from chips into broader technology breadth, would warn that investors are demanding better prices before adding exposure. The Kospi's near-9% decline is a reminder that regional risk can arrive ahead of the US session.

The AI-valuation debate is not new, but Monday's session framed it sharply. For much of the prior year, investors rewarded any company with a credible AI narrative, pushing multiples higher on the assumption that earnings would eventually catch up. The risk in that setup is that when a crowded theme pauses, the same momentum that lifted prices can accelerate the exit. The semiconductor complex is where that tension is most visible, because chip demand is both the clearest proof of the AI build-out and the most sensitive to a slowdown in customer spending or a change in capacity plans.

A useful reference point is that sharp single-day drops in the Nasdaq have, in past cycles, marked either a healthy reset within a longer uptrend or the start of a deeper correction. The distinguishing factor is usually whether the underlying earnings support holds. With big-bank earnings and CPI arriving within days, the market will get fresh evidence on profit growth and the rate path almost immediately. That makes this week unusually informative: the 1.55% decline is a warning to reassess entry points, not yet a signal that the structural AI case has broken.

The Asia-session signal should not be ignored. South Korea's Kospi falling nearly 9% and dragging chip heavyweights lower shows how a regional repricing in the same theme can precede US weakness. When the most crowded AI names sell off overseas first, US traders often use that as an early warning for their own session. The fact that SpaceX also slipped toward its $135 IPO price underscores how broad the de-risking was, reaching from established semiconductors to freshly listed names. Monitoring Asian technology breadth alongside US futures is a practical way to gauge whether the pressure is localised or systemic.

Risk management matters more than narrative here. Semiconductor cyclicality, customer concentration, supply changes, and valuation sensitivity can all produce large moves even when AI demand remains structurally positive. Traders should separate the long-term theme from the short-term entry and define exposure around volatility rather than around the story alone. The combination of bank earnings, CPI, and energy shocks means several catalysts can reprice the index within a single session.

The balanced conclusion is that the Nasdaq's 1.55% decline is a valuation check, not a fundamental breakdown. Strong AI-infrastructure demand can coexist with a sharp correction in crowded positions, and the 4.8% semiconductor drop shows how fast that repricing can happen. MC Markets traders can use NAS100 to monitor whether technology leadership stabilises or broadens into a wider risk-off move. The scenarios described here are market analysis, not personal financial advice.

Trading Insight

The Nasdaq's 1.55% drop and the 4.8% semiconductor fall show a valuation check rather than a breakdown in AI demand. Watch whether the PHLX Semiconductor Index stabilises and whether the selloff stays concentrated in chips or spreads into broader tech breadth. Bank earnings and June CPI at 3.8% expected are the next catalysts. This is market commentary, not personal financial advice.