5/26 US Market - Micron Surges 19%… AI Semiconductors Push US Market to All-Time High Again
May 26, 2026 Market Analysis
## 1. Today's Market at a Glance
On Tuesday, May 26, the US market had an extreme day with technology and semiconductors surging and energy plummeting.
- S&P 500·Nasdaq: Closes at all-time high again, driven by semiconductor rally (schaeffersresearch.com)
- Market sentiment: 8 out of 11 sectors rise, with technology stocks leading at +1.37%, and energy performing worst at -2.42%
- Key takeaway: "A day when AI semiconductors pulled up the entire index, and crude oil plunge pushed down energy stocks"
This trend is not just a one-day story, but a continuation of the 'AI and semiconductor momentum vs. defensive and energy underperformance' dynamic that has been ongoing for the past two months.
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## 2. Technology and Semiconductors: AI Rally Ignited by Micron
### 2-1. Micron Surges 19%, Joins $1 Trillion Club
Today the technology sector rose +1.37%, leading the overall market. Micron Technology (Micron, MU) was at the center of this.
- Micron stock: Surged approximately +19%, and reports emerged that intraday market capitalization broke through $1 trillion, newly joining the '$1 trillion club'. (apnews.com)
- Background: UBS raised its price target by upgrading AI memory demand forecasts, and the dominant analysis is that a global AI infrastructure investment boom is strongly supporting memory semiconductor demand. (fool.com)
- Since March earnings already demonstrated AI demand benefits with record-level revenue, profit, and cash flow, today can be seen as a day when that story was re-evaluated once again. (investors.micron.com)
Along with this, other semiconductor and equipment stocks like ON Semiconductor (ON +9.72%), Teradyne (TER +8.56%), and Western Digital (WDC +8%) also surged strongly, pulling up the entire sector.
> So what's important?
> It means companies playing the "picks and shovels" role in AI infrastructure (data centers, cloud, semiconductors) remain at the center of the market. Even though the index appears expensive, it signals that the trend of selection and concentration centered on AI beneficiary stocks continues.
### 2-2. Short-term and Medium-term Trends: Continuation of Technology Sector Momentum
Looking at both short-term (7-day) and 2-month trends shows that today's rally is not a coincidence but a continuation of the trend.
- 7-day trend:
- After 5/19 decline of -0.69%, followed by 5/20 +2.01% → 5/22 +2.52% → 5/26 +1.37%,
- Three out of the last four trading days show strong gains around 2%.
- 60-day trend:
- After 3/27, technology sector portfolio surged approximately +28.9%,
- After briefly catching breath (adjustment below -2%) from 5/11~5/19, it entered a new uptrend of +8.3% starting from 5/19.
Meaning for investors
- Even though it appears to have risen significantly, it shows that market consensus that 'the AI infrastructure investment cycle is still ongoing' is being maintained.
- However, for investors with already large technology sector allocations,
- recheck individual stocks and valuations, and
- a strategy of consolidating around companies with actual earnings momentum is reasonable.
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## 3. Energy: 'Worst Sector' Created by 7% Crude Oil Plunge
Today the energy sector declined -2.42%, the worst performance among 11 sectors.
### 3-1. Crude Oil Price Drops 7%
- International oil prices (Brent crude basis) plunged about 7% in local markets on May 26. (meyka.com)
- Background:
- Concerns about Middle East supply disruptions eased with expectations for peace negotiations related to Iran conflict, and
- crude oil that had been betting on 'worst-case scenario' faces a sharp reversal.
Stock-wise, some service and equipment stocks (SLB, BKR, etc.) rose slightly on short-term oversold sentiment and individual positive catalysts, but this was insufficient to reverse the entire sector trend.
### 3-2. Medium-term Trend: Fatigue After Initial Rally
The energy sector's 2-month trend shows an 'initial strength → increased volatility → recent slight rebound' structure.
- 3/2~3/27: Started with a surge of +11%+
- 3/27~4/17: Plunged -12%+, giving back most gains
- 4/17~5/5: +10% rebound, after short-term plunge on 5/5
- After 5/6: Entered a gentle +1.3% uptrend
With today's -2.42% added on top, it reinforced the impression that this sector rides a roller coaster with crude oil in the short term.
Meaning for investors
- While crude oil has plunged, some analysis suggests it still remains at price levels higher than historical averages due to war and geopolitical risks. (ft.lk)
- Energy stocks have a strong character of 'betting on crude oil direction,' so it's necessary to first check whether you can tolerate volatility.
- From a portfolio perspective, a strategy of reducing excessive energy allocation and organizing around blue-chip stocks with stable dividends and cash flow can be relatively defensive.
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## 4. Economy and Sentiment: Consumers Remain Cautious
Today was important news not just for the stock market but also for consumer sentiment indicators.
### 4-1. Consumer Confidence Index Slightly Declines
- The Conference Board's May consumer confidence index fell 0.7 points to 93.1 from the previous month (93.8).(ca.investing.com)
- Considering that it frequently hovered around 130 before the pandemic, it remains at a low level.
- Recent surveys show prominent concerns about inflation, high interest rates, and high oil prices, and survey results also show that two out of three Americans are reducing spending.(apnews.com)
> In other words, the contradiction that "stocks are at all-time highs, but household economic sentiment remains tight" continues.
### 4-2. Consumer Sentiment Reflected by Sector
- Consumer Cyclical Sectors:
- Today it rose slightly by +0.47%, but looking at the entire past two months, it has declined about -6.8%.
- Between 4/20 and 5/19, it experienced a correction approaching -11%.
- Looking at advances/declines today, cruise, airline, and leisure stocks rose, but some stocks like AutoZone (AZO -8.99%) declined significantly.
- Consumer Defensive Sectors:
- Today it declined -1.29%, relatively sharply, and since March it has continued with a prolonged decline of about -9%.
Meaning for Investors
- While the index is good, consumer-related stocks remain in a 'separating the wheat from the chaff' phase.
- Brands and essential companies with strong pricing power, and
- the environment where performance gaps between travel and leisure stocks sensitive to economic recovery can widen significantly.
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## 5. Other Sectors: Quiet but Meaningful Movements
### 5-1. Industrials: Rebound in Travel and Transportation Stocks
- The industrial sector rose +1.36% today.
- In particular, airline stocks (UAL +5.96%, DAL +4.27%) and some economically sensitive equipment and machinery (e.g., CMI +4.57%) showed strength.
- Looking at the 7-day trend, after a -1.43% correction on 5/19, it shows a 'stepped' recovery with 5/20 +1.53% → 5/22 +0.81% → 5/26 +1.36%.
- On the 60-day trend, after a sharp fall in mid-March, it rebounded +9.8% by mid-April, then paused from late April to mid-May, and a new uptrend starting 5/21 (currently +2.3%) has begun.
Meaning: Gradual capital inflows are appearing in stocks related to real economy such as manufacturing, transportation, and aviation, suggesting that the market is not entirely focused on 'only AI.'
### 5-2. REITs and Real Estate: Gradual Recovery Amid Interest Rate Burden
- The real estate sector rose +0.25% today, quietly continuing its uptrend.
- Since March, it was once down over -8%, but through gradual recovery, it has now risen to about +2.8% returns.
- Looking at just the recent period (since 5/15), it's up +3.9%, a firmer trend than expected.
This can be seen as reflecting market perception that the sharp surge in long-term rates has somewhat moderated and REIT dividend yields are beginning to look attractive again.
### 5-3. Financials, Communications, and Utilities: Quiet 'Positives'
- Financials: Today's movement near flat at +0.05%.
- Combined over the past two months, it's only about +1.6%, a slight underperformance versus the index.
- Communication Services: Today +0.25%, nearly flat when combined over two months (-0.7%).
- Utilities: Today +0.05%, down around -3% over two months, but in a +2.3% rebound period since 5/19.
Meaning: Defensive and income stocks are in a neutral position, 'neither notably bad nor notably good.'
They can serve as a buffer to moderate the volatility of technology and semiconductor stocks for investors who prefer high dividends and low volatility.
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## 6. How Should We Interpret Today's Numbers?
Finally, let me summarize today's market with several key concepts.
1. The AI Infrastructure Investment Cycle Is Still Ongoing
- Micron's joining the $1 trillion club and the semiconductor sector's surge
- reinforce the view that we're at the beginning of a new industry cycle, not just a temporary profit-taking phase.
2. Divergence Between Real Economy and Financial Markets
- While consumer confidence is low and more than one in two is reducing spending,(apnews.com)
- the stock market is reaching all-time highs.
- It's more accurate to understand this as a phase where 'money is flowing into specific growth stories (like AI) rather than the entire economy being healthy.'
3. Portfolio Strategy Using Temperature Differences Between Sectors
- If your tech and semiconductor allocation is low:
- Consider gradually increasing allocation to key beneficiaries of AI infrastructure.
- If your energy and cyclical stock allocation is high:
- Rebalancing toward quality stocks and dividends considering oil price volatility and economic uncertainty can help with risk management.
- Defensive stocks (consumer staples, utilities, REITs) are:
- able to serve as volatility buffers, still meaningful for reducing overall portfolio fluctuations.
4. A Time-Based Perspective
- Short-term (1 week): Tech and industrials show clear upward momentum, energy is a roller coaster, consumer stocks are mixed.
- Medium-term (2-3 months): Tech shows strong uptrend, energy has high volatility both ways, consumer and defensive stocks are sluggish.
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## 7. Closing: Questions Investors Should Ask Themselves Now
On days like today, here are questions investors should ask themselves:
- Is my AI and semiconductor allocation too small, or is it too concentrated?
- Assuming oil price and geopolitical risks ease, is my energy allocation appropriate?
- How exposed am I to companies that can survive weak consumer sentiment with pricing power and brand strength?
Organizing answers to these questions will serve as a 'benchmark for responding strategically rather than being swayed by news' when similar news emerges in the future.
This content is provided for informational purposes only and does not recommend investment in any specific stock or asset.
Source: https://nextinvest.org/ko
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