5/31 Weekly Summary - AI Infrastructure Boom Confirmed by 'Dell Rally', Energy & Defensive Stocks Take a Breather This Week

May 31, 2026 Weekly Market Analysis

## This Week's Key Theme: "AI Server-Driven Rally, Real Economy in Check Mode"

The keyword for the U.S. stock market this week (May 25-31) was AI infrastructure. In particular, Dell Technologies (DELL) sparked the entire technology sector with a dramatic surge in AI server revenues and a significant upward revision of annual guidance. Dell reported that AI-optimized server revenue increased more than sevenfold year-over-year in the first quarter and announced annual AI server revenue projections of approximately $60 billion, surprising the market.(crn.com) As a result, the stock price jumped nearly 70% for the week, instantly boosting the technology sector returns of the Nasdaq-100 and S&P 500.

Looking at sector returns (10 trading days basis):

- Technology: +9.89% (Leading)

- Energy: -2.83% (Weakest)

- 8 out of 11 sectors overall in positive territory

Looking at 30-day and 120-day trends, this tech rally is not a short-term flash but rather a continuation of the AI theme that has been ongoing for 3-4 months. The technology sector was already showing strength at 30D +23.27% and 120D +37.86%, and sector trend analysis also opened a new +12.17% upside window after May 19.

In contrast, energy and materials sectors took a step back amid oil price adjustments and concerns about weakening economic momentum, making this a week where the temperature gap between "growth story represented by AI vs. traditional economic and commodity story" became clear.

---

## Sector Performance: AI Infrastructure vs. Traditional Cyclical Stocks

### 1. Technology: Explosive Demand for AI Servers and Data Infrastructure

- 10D: +9.89%

- 30D: +23.27%

- 120D: +37.86%

- Portfolio Index: 132.75 (vs. 3/5 +32.75%)

- Current trend: +12.17% additional gain after 5/19

Almost every path of this week's technology sector rally converges on AI infrastructure.

- Dell (DELL): Following the Q1 earnings announcement, with AI server revenue increasing approximately 757% year-over-year and significantly raising AI server order backlog and future revenue outlook, the stock surged 30-40% in a single day, recording nearly 70% gains for the week.(crn.com) Dell presented annual AI server revenue projections of approximately $60 billion, effectively establishing itself as a "key beneficiary of AI data center hardware" in the market.(ts2.tech)

- NetApp (NTAP): In Q4 and fiscal 2026 results, demand for cloud, flash storage, and AI data infrastructure drove performance, and the stock surged in the 20% range alongside raised guidance.(netapp.com) Management emphasized data infrastructure demand for AI workloads as a "growth axis".(fool.com)

- Arm Holdings (ARM) similarly maintained expectations for AI chip design demand that has continued for several weeks, continuing its uptrend with strong volatility this week.(fxleaders.com)

Why is this important?

- AI is no longer just a matter of software and algorithms, but is now directly connected to real-world purchases of servers, storage, memory, and networking equipment.

- Dell and NetApp results are evidence that enterprises and cloud providers are actually spending substantial amounts on data centers and AI infrastructure.

- From an investor perspective, this is a phase where stocks connected to AI infrastructure (servers, storage, semiconductors, power/cooling, etc.) within the technology sector are commanding market premiums.

### 2. Consumer Cyclical: Recovery Signals in AI PC, Automotive, and High-End Consumer Spending

- 10D: +4.66%

- 30D: -2.11% (underperforming until recently)

- 120D: -1.86%

- Portfolio Index: 95.69 (vs. 3/5 -4.31%, still below baseline)

- Current trend: +5.78% short-term rebound window after 5/18

This week on the consumer side, Best Buy (BBY) stands out.

- Best Buy's 5/28 earnings beat market expectations on revenue and same-store sales, and particularly positive commentary about AI-enabled PC and high-end electronics replacement demand drove the stock higher.(pymnts.com) As a result, the stock surged approximately 38% for the week.

- Ford (Ford), Deckers (Deckers) and other automotive and apparel/footwear stocks also showed correlated strength, lifting sector returns.

Implications for Consumer Spending and the Real Economy

- High-end electronics (PCs, TVs, gaming consoles, etc.) are highly economically sensitive items. Best Buy's mention of positive growth for the first time in years, citing AI PC, gaming, and connected device demand, signals that U.S. consumer spending is more solid than expected.(pymnts.com)

- However, 30D and 120D returns remain negative, so whether this week's rebound marks the beginning of structural recovery or is a "short cover" driven by short-term catalysts needs further observation. Sector trend analysis shows only a +5.78% rebound starting from 5/18 after adjustments exceeding -10% through mid-May.

### 3. Healthcare: Defensive Gains in a Weak Market

- 10D: +1.94%

- 30D: +0.32%

- 120D: -2.98% (long-term performance is weak)

- Portfolio Index: 97.09 (-2.91% vs 3/5)

- Current Trend: Mild recovery of +2.75% since 4/29

Healthcare is a traditional defensive sector where capital flows when the market swings up and down. This week too, amid strong AI technology rallies, healthcare equipment and diagnostic companies quietly rose.

- Dexcom (DXCM), Agilent (A), Bio-Techne (TECH) and others surged over 10%, supporting the sector. These companies operate in fields with relatively consistent demand regardless of economic cycles, such as diabetes management, life science equipment, and research reagents.

Investment Perspective

- As the market overheats toward AI and high-growth stocks, it's necessary to maintain a certain level of defensive stock allocation from a portfolio perspective.

- Healthcare remains negative on a recent 120-day basis, so valuation pressure is relatively eased, and for long-term investors, this can be viewed as a window for dollar-cost averaging.

### 4. REITs & Real Estate: Dual Axis of Interest Rates and AI Data Centers

- 10D: +1.22%

- 30D: +2.11%

- 120D: +9.89%

- Portfolio Index: 102.38 (+2.38% vs 3/5)

- Current Trend: Mild adjustment of -0.85% since 5/6

The REIT sector is sensitive to long-term interest rate levels and real estate/rental demand. This week:

- REITs linked to cell towers, life sciences, and data centers such as American Tower (AMT) and Alexandria Real Estate (ARE) recorded gains in the 7-10% range.

- This can be viewed as a trend reflecting expectations of increased demand for data centers and towers due to AI and cloud expansion.

However, from a sector trend perspective, it has entered a mild adjustment phase of -0.85% since 5/6, so momentum has slowed somewhat in the short term.

### 5. Financial Services: "Quiet Plus" Linked to Interest Rates and Market Levels

- 10D: +0.41%

- 30D: -0.64%

- 120D: -0.68%

- Portfolio Index: 101.74 (+1.74% vs 3/5)

- Current Trend: Testing upper side of range with +0.62% since 5/11

Financial stocks moved this week like a function of market direction without major news.

- Financials focused on data, platforms, and index businesses such as FDS, HOOD, and MSCI showed strength, creating small gains.

- As interest rate cut expectations didn't come back into sharp focus, focus has shifted more toward capital markets and asset management fee revenues rather than net interest margin (NIM) expansion stories.

### 6. Communication, Utilities, Materials, and Energy: Differentiated "Slow Phases"

- Communication Services: 10D +0.79%, 30D -1.34%, 120D -2.20%

- A sector mixing advertising, entertainment, and gaming platforms; APP, TKO, TTD and others rose on individual positive news, but the overall index remained slightly positive.

- Utilities: 10D -0.24%, 30D -3.98%, 120D +5.39%

- Some power and utility stocks like VST and D were strong, but the sector itself is catching its breath due to interest rate and regulatory issues. The sector trend has shown slight rebound of +1.99% since 5/15 after adjustment.

- Basic Materials: 10D -1.21%, 30D -1.09%, 120D +22.42%

- Steel stocks like STLD and NUE rose, but fatigue is appearing after strong rallies over recent months. The sector trend has switched to upside at +3.76% since 5/19, but volatility could increase depending on oil and metal price movements.

- Energy: 10D -2.83%, 30D +0.40%, 120D +23.55%

- Refining stocks like PSX and VLO rose partially, but the overall sector recorded losses. International crude prices have adjusted to demand concerns and supply variables, falling to the lowest levels since mid-April.(kiplinger.com) The sector trend continues to show a -5.97% decline since 5/5, so the energy rally is taking a breather for now.

---

## Key Stock Trends: Five Stories That Moved This Week

### 1. Dell: "Engine Room of AI Servers"

- In Q1 earnings, revenue and profit significantly exceeded market expectations, with particularly explosive growth in AI server revenue and order backlogs.(crn.com)

- The company raised its annual revenue guidance for AI servers to approximately $60 billion and mentioned that data center investment cycles would continue for years to come.(ts2.tech)

- From an investor perspective, Dell is now being re-evaluated not simply as a PC and server vendor, but as a core supplier of AI infrastructure.

### 2. NetApp: Quiet Winner in AI Data Infrastructure

- In Q4 earnings announcements, cloud, all-flash storage, and AI workload-related revenues showed strong performance, with stock surging over 20%.(netapp.com)

- Management emphasized that AI-related orders more than doubled year-over-year, with AI data storage and management infrastructure serving as growth drivers.(fool.com)

### 3. Arm (ARM): Long-term Story in AI Chip Design

- Following earnings announcements in early May, volatility was high, but expectations for AI, server, and edge device chip design demand continued, maintaining strong momentum this week.(fxleaders.com)

- While Arm doesn't directly sell AI servers, it provides design IP that goes into most smartphones and embedded devices, so long-term royalty benefits from AI proliferation are expected.

### 4. Best Buy (BBY): Signal Flare of AI PC Upgrade Cycle?

- Results showed revenue and profits exceeding consensus, and with positive outlook on demand for AI-equipped PCs, consumer electronics, and gaming devices highlighted, the stock price surged in the upper 30% range on a weekly basis.(pymnts.com)

- This signifies that households still have the capacity to spend on essentials and expensive items, which has somewhat eased anxiety about the consumer and retail sectors going forward.

### 5. Airlines, Travel & REITs: Improvement Signals Connected to the Real Economy

- Airline stocks such as United Airlines (UAL) and Delta Airlines (DAL), along with some hotel and REIT stocks (HST, etc.), showed increases in the 10-20% range amid expectations for summer travel demand.

- This suggests that service-oriented consumption recovery is still underway, showing that the service economy, unlike manufacturing and energy, is supporting the U.S. economy.

---

## Next Week's Focus Points: AI Momentum vs. Macro Reality Check

Finally, here are the key points to check when looking at next week's market:

### 1. Sustainability of AI Infrastructure Rally

- Because AI infrastructure beneficiary stocks such as Dell and NetApp have risen significantly in a short period, profit-taking sales may emerge.

- From an investor's perspective, it is necessary to continuously monitor whether these companies maintain actual order continuity, margin sustainability, and memory and component supply constraints. There are also analyses showing that memory supply shortages and price increases are already affecting AI server and storage prices.(itpro.com)

### 2. Interest Rate, Inflation Indicators and Defensive Stock Movements

- Depending on inflation and employment-related indicators to be announced next week, expectations for the Fed's interest rate cut timing may be adjusted again.

- If interest rates move up again, it could be a burden on REITs, utilities, and high-dividend stocks, but a relative positive for banks and short-term cash assets.

### 3. Whether Energy and Commodities Will Rebound

- The energy sector has faced adjustments as oil prices have fallen to their lowest levels since mid-April.(kiplinger.com)

- If news about Middle East or Russia-related supply issues or China economic stimulus emerges next week, short-term rebound momentum could develop in the energy and materials sectors.

### 4. Implications for Individual Investors

- This is a market where the temperature difference between AI growth stocks and defensive value stocks and high-dividend stocks is stark.

- Rather than tilting to one side,

- AI infrastructure, semiconductor, and data center stocks with clear long-term growth stories and

- some healthcare, consumer staples, and utility stocks with strong cash flows regardless of economic cycles

seem important at this point to hold together using a basket strategy (sector diversification).

In summary, this week's market was "the week when the AI infrastructure boom was confirmed through actual results and stock prices," while at the same time energy and traditional business cycle-sensitive stocks entered a consolidation period. Next week, the key point to watch will be whether this AI momentum settles into a sustainable growth story or leads to adjustment after short-term overheating.

This content is written for informational purposes only and does not recommend investment in any specific stock or asset.

Source: https://nextinvest.org/ko

Feel free to share without permission ^^