AMD's post-earnings slump did not deter capital from continuing to chase AI leaders.
On Wednesday, U.S. chip stocks showed a clear divergence. After AMD's disappointing guidance released post-market on Tuesday failed to meet lofty expectations, its shares opened with a gap down of about 6.6% and fell as much as 7.8% in early trading. This dragged the Philadelphia Semiconductor Index (SOX), which tracks 30 blue-chip chip stocks, from a four-day winning streak, with an intraday low drop exceeding 1.6%.
In contrast, NVIDIA, AMD's rival and the "king" of AI chips, along with memory chip giant Micron Technology, continued to climb. NVIDIA rose as high as $222.22 during the session, an intraday high not seen since June 3, with a daily gain of up to 4.85%. This pushed its market capitalization close to $5.8 trillion, marking its fifth consecutive day of gains.
Micron Technology rose for the third straight day, gaining nearly 4.1% at its intraday peak on Wednesday, pushing its market cap back above the $1 trillion threshold.
Market participants believe the day's trading reflected not a cooling of the AI trade, but a further divergence within the AI sector. Following profit-taking triggered by AMD's guidance, capital did not broadly exit the AI theme. Instead, it continued to flow towards leaders with clearer competitive advantages and more certain earnings trajectories, with NVIDIA and Micron Technology becoming the focus of this capital "herding" effect.
For NVIDIA, this rally appears more like a short-term rebound driven by sentiment, capital flows, and industry catalysts. For Micron Technology, reclaiming the $1 trillion market cap signifies that capital markets are increasingly pricing in the value of memory chips in the AI era.
AMD Drags Down the Sector, NVIDIA Defies the Trend with Five Straight Gains
Unlike the broad-based rally of previous days, Wednesday saw a clear structural movement in semiconductor stocks. AMD's second-quarter results showed continued benefits from AI demand, but its third-quarter revenue guidance midpoint of $13 billion failed to surpass the market's more optimistic expectations. After a significant run-up, investors chose to take profits, weighing on AMD's stock post-market and the following day, making it the primary drag on the Philadelphia Semiconductor Index's pullback.
From a timing perspective, NVIDIA's rebound coincided with a notable recovery in market risk appetite. Recently, tech giants like Microsoft, Amazon, and Meta have consistently reinforced their AI investment expectations. The market projects global AI infrastructure spending to exceed $750 billion this year, potentially approaching the trillion-dollar level next year. Concurrently, AI demand signals from the earnings season have been broadly stronger than expected, prompting capital to flow back into the semiconductor sector.
However, capital did not abandon the AI theme; instead, it concentrated further on industry leaders. NVIDIA has risen for five consecutive sessions, hitting an intraday high of $222.22 on Wednesday, the highest since June 3. Market analysis attributes this rally to multiple factors: on one hand, large tech companies like Microsoft, Meta, and Amazon continue to signal strong AI capital expenditure, sustaining optimism about the AI infrastructure investment cycle. On the other hand, improving U.S. inflation data has boosted overall risk appetite for growth stocks.
Meanwhile, positive news surrounding NVIDIA's AI ecosystem continues to provide catalysts. Expectations for new-generation AI server deployments, hyperscale data center construction, and expanding AI inference demand solidify NVIDIA's position as the preferred choice for capital allocating to AI computing assets. During SpaceX's post-market earnings call on Tuesday, CEO Elon Musk stated that SpaceX will fully adopt NVIDIA chips in the future, calling the Vera Rubin architecture one of the best AI computing platforms currently available. This news further reinforced the market's perception of NVIDIA's dominance in AI infrastructure, serving as a key catalyst for the stock's upward move on Wednesday.
Technically, five consecutive days of gains reaching a two-month high means NVIDIA has largely recovered from the pullback since early June, indicating capital is retesting previous high areas. However, the stock price is still some distance from its all-time high set in May. This rally reflects more of a short-term trend recovery than a breakout to new highs. For short-term traders, reaching a two-month high is significant as it brings NVIDIA back near its historical high range, shifting market focus from "is AI investment overheated?" to "can AI demand continue to exceed expectations?"
Strengthened Leadership Effect: NVIDIA's $5.8 Trillion Market Cap Continues Reshaping the Market Landscape
With the stock price climbing, NVIDIA's total market cap briefly approached $5.8 trillion on Wednesday, further solidifying its position as the world's most valuable technology company. For the market, NVIDIA's importance extends far beyond the company itself. As a core beneficiary of the AI computing power chain, it has become a significant weight in global tech stocks and U.S. indices, with its stock price volatility increasingly impacting the Nasdaq and S&P 500.
More notably, NVIDIA's rise on Wednesday occurred against the backdrop of a broad semiconductor index pullback. This suggests the market's trading logic is shifting from a general chase of AI concept stocks towards a repricing of competitive advantages and earnings delivery capabilities of leaders. Compared to broad sector valuation expansion, capital now prefers to concentrate on AI leaders with scale, technological leadership, and demand certainty. This is key to why NVIDIA continues to attract capital inflows even as the sector faces pressure.
Micron Reclaims Trillion-Dollar Market Cap: AI Memory Leader Ushers in a New Round of Valuation Reassessment
If NVIDIA represents AI computing power, then Micron Technology is a major beneficiary of sustained AI memory demand. On Wednesday, Micron Technology rose for the third consecutive day, climbing nearly 4.1% at its intraday peak, pushing its market cap back above the $1 trillion mark. This marks the company's return to the "trillion-dollar club" after previously crossing this milestone.
This market cap milestone reflects a continued reassessment of the value of the AI memory supply chain by capital markets. Compared to its past image as a traditional memory manufacturer reliant on PC and smartphone cycles, Micron Technology is increasingly viewed by the market as a core supplier of AI infrastructure. With AI training and inference driving rapid growth in memory bandwidth demand, High Bandwidth Memory (HBM) has become one of the most critical components for AI servers. The market generally expects HBM supply to remain tight for the next few years, positioning Micron Technology, as a major global HBM supplier, as a key beneficiary of the AI infrastructure investment cycle.
Compared to its previous market cap of around $800 billion, the current higher valuation for Micron Technology is not just due to improved memory industry fundamentals. More importantly, investors are beginning to view it as a vital component of AI infrastructure, not just a traditional memory chip maker. The market action on Wednesday shows that capital is not only betting on GPU leader NVIDIA but is also simultaneously raising valuation estimates for the AI memory leader.
The sharp contrast between AMD's post-earnings slump and the counter-trend rallies of NVIDIA and Micron Technology reflects the AI market entering a new phase. The market has not abandoned the AI theme, but is applying stricter screening based on earnings delivery, competitive moats, and growth certainty. For investors, the AI trade continues, but capital is increasingly concentrated in a few core leaders with clear advantages, rather than a broad-based rally across the entire sector.
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