Why U.S. Stocks Rebounded: Hormuz Risk Eases, Nasdaq and AI Semiconductors Recover [EN]

* The original Korean post is available here. -> Korean Version

War risk eased. Oil moved higher again. Technology stocks rebounded. But what the market bought was not peace. It bought time — the idea that things are not getting worse for now.
— System View Daily Market Framework

[System View Quick Take]

U.S. stocks rebounded strongly on June 29.
The Dow rose 0.59%, the S&P 500 gained 1.18%, and the Nasdaq climbed 2.07%.
The Dow closed at a record high, while the S&P 500 and Nasdaq snapped five-session losing streaks.
The direct trigger was easing U.S.-Iran tensions and expectations that the Strait of Hormuz would remain open.
But this was not a full removal of risk. Hormuz traffic is recovering, but it has not fully returned to pre-war levels.
Oil rose during regular trading. Brent closed at $73.15, while WTI rose to $70.75.
Technology and AI-related stocks rebounded after their recent selloff, while quarter-end window dressing also supported the indexes.
Today’s core issue is not “the end of Middle East risk.”
The core issue is that escalation risk paused for now, allowing technology positions to reverse part of last week’s liquidation.

1. U.S. Market Summary: Dow Hits Record High, Nasdaq Rebounds With Technology Stocks

Easing Middle East tension and quarter-end flows worked together

U.S. stocks rebounded sharply on Monday, June 29, 2026. The Dow Jones Industrial Average rose 306.63 points, or 0.59%, to close at 52,182.74. The S&P 500 climbed 86.41 points, or 1.18%, to 7,440.43. The Nasdaq Composite gained 522.53 points, or 2.07%, to close at 25,820.14.

The surface reason for the rebound was easing U.S.-Iran tension. The weekend had included attacks from both sides, but markets reduced the probability of broader escalation as signs of halted attacks and possible renewed discussions emerged. Energy logistics around the Strait of Hormuz have not fully normalized, but the market stepped back from the worst-case blockade scenario.

However, explaining the equity rebound only through geopolitics would be incomplete. Technology and AI-related stocks also rebounded strongly. Last week, semiconductors and large-cap technology names were pressured by AI investment costs, rising memory prices, and valuation concerns. On Monday, part of that short exposure was reversed.

Quarter-end positioning also helped. At quarter-end, institutional investors often rebalance portfolios and add exposure back to strong names. This rebound should therefore be read as a combination of lower geopolitical risk, a technology-stock reversal, and quarter-end flows.

[System View Market Brief] U.S. Market Close on June 29

Asset / Index	Close / Move	System View Interpretation
Dow Jones	52,182.74 +0.59%	Record closing high. Easing Middle East risk and large-cap flows supported the index.
S&P 500	7,440.43 +1.18%	The index snapped a five-session losing streak as risk aversion eased and quarter-end flows improved.
Nasdaq	25,820.14 +2.07%	Technology and AI-related stocks rebounded after the recent correction.
Brent	$73.15 +1.61%	Hormuz risk has not disappeared. Expectations of halted attacks and recovering shipping flows limited the upside.
WTI	$70.75 +2.20%	Part of the weekend conflict risk was reflected, but supply-recovery expectations prevented a surge.
U.S. Treasury Yields	Slightly higher	As risk aversion eased, bond-buying pressure weakened. The market’s focus shifted back toward labor data.

2. Today’s Core Variable: Easing Escalation Risk and Technology Position Reversal

The market did not buy peace. It bought time after the worst-case scenario was delayed.

Today’s core variable is the easing of U.S.-Iran tensions. The weekend attacks showed again how fragile the ceasefire structure remains. But as signs of halted attacks and possible renewed talks emerged, markets reduced the probability of full-scale escalation.

This should not be interpreted as “Middle East risk is over.” Traffic through the Strait of Hormuz is recovering, but it has not returned to pre-war normality. Some vessels are still moving with tracking devices switched off, while insurance and route risks remain.

Therefore, what the market bought was not peace. It bought time — the idea that Hormuz is not being shut immediately. This distinction matters. Geopolitical risk has not been removed. The immediate tail risk has merely declined.

On top of that time, technology stocks rebounded. Last week, semiconductors and AI-related names were pressured by AI capex concerns, rising memory prices, and valuation debates. On Monday, as escalation risk cooled, investors bought back part of the technology and AI exposure they had reduced.

[System View Core Line]

The market did not decide that Middle East risk was over.
It decided that the immediate probability of escalation had declined.
In that gap, technology and AI-related positions reversed higher.
This rebound is closer to a partial reversal of excessive risk aversion than a new wave of optimism.

3. Causal Chain: Why Easing Hormuz Risk Led to a Nasdaq Rebound

Oil, rates, and technology positioning moved in the same direction

The causal structure behind this rebound is not simply “good news pushed stocks higher.” More precisely, easing geopolitical risk affected oil, rates, and technology positioning at the same time.

First, the risk of a full Strait of Hormuz blockade declined. Despite attacks and tensions, Middle East producers continued loading crude oil and LNG. That reduced fears of a worst-case global energy supply disruption.

Second, oil rose but did not surge. Brent and WTI moved higher after the weekend conflict, but recovering shipping-flow expectations capped the move. This was important. If oil does not explode higher, the inflation and rate shock also remains limited.

Third, as rate pressure did not intensify sharply, technology stocks rebounded. Recently, technology and semiconductor stocks were pressured by rates, AI capex, and rising memory costs. Once Middle East risk did not worsen, markets bought back part of the technology exposure sold last week.

Fourth, quarter-end flows amplified the move. Institutional investors may rebalance toward stronger names and large-cap technology near quarter-end. Monday’s rally should therefore be viewed as the combined result of macro risk relief and positioning.

[Causal Chain] Why U.S. Stocks Rebounded

Stage	Event	Market Interpretation
Stage 1	Expectation of halted U.S.-Iran attacks	The probability of full escalation and a Hormuz blockade declined.
Stage 2	Middle East crude and LNG loading continued	The market judged that actual supply disruption was not at the worst-case level.
Stage 3	Oil rebounded, but the surge was limited	Inflation and rate shocks did not reaccelerate aggressively.
Stage 4	Technology and AI-related stocks rebounded	Part of last week’s reduced exposure was reversed.
Stage 5	Quarter-end window dressing	Institutional flows amplified the rebound in large-cap technology.

4. Data and Calendar Check: Focus Moves Back to Jobs and JOLTS

When geopolitical risk cools, the market returns to the Fed path

Monday did not revolve around a major data release, but investors are shifting their focus back to U.S. labor data and the Fed path. This week, JOLTS and the employment report are the main checkpoints.

When geopolitical risk is high, markets look first at oil and Hormuz. But once escalation risk declines, markets return to rates and economic data. The current market is trying to confirm how much the labor market is cooling while PCE remains elevated and consumer income and spending are still resilient.

If employment is too strong, Fed tightening caution can return. If employment weakens too sharply, recession concerns can rise. The market’s preferred combination is clear: labor demand cooling gradually, inflation moving lower, and oil not surging.

Therefore, today’s rebound is a pause before labor data. Geopolitical risk eased and technology stocks rebounded, but the final judgment on the Fed path remains ahead.

[Macro Data Check] Indicators to Watch This Week

Indicator / Event	Checkpoint	Market Interpretation
JOLTS	Change in job openings	If labor demand remains strong, expectations for Fed easing weaken.
Employment Report	Payroll growth and wages	Strong jobs increase rate pressure. Weak jobs increase growth-slowdown risk.
Hormuz Traffic	Tanker movement and insurance costs	If traffic continues, the risk of an oil-price spike remains limited.
Oil	Whether Brent stays in the $70 range	If oil does not surge, inflation reacceleration fears remain limited.

5. Cross-Asset Flow: Rates, Dollar, and Oil

Oil rose, but supply-recovery expectations prevented a spike

Oil rebounded. Brent rose to $73.15, while WTI climbed to $70.75. The weekend had included conflict between the U.S. and Iran, and the risk around the Strait of Hormuz had not fully disappeared.

But the upside was limited. Middle East producers continued loading crude oil and LNG, and shipping flows through Hormuz are recovering. The market’s message was: risk remains, but supply has not been fully blocked.

This matters for rates and equities. If oil had surged above $80, inflation caution and rate pressure could have returned quickly. But with oil only rebounding in the low-$70 range, there was no inflation shock strong enough to block the rebound in technology stocks.

The dollar softened slightly, but it remains elevated. Middle East risk is not fully gone, and Fed caution remains ahead of U.S. labor data. Therefore, it is still too early to read dollar weakness as a full risk-on signal.

[Cross Asset Check] Signals From Oil, Rates, and the Dollar

Variable	Move	Interpretation
Brent	$73.15 +1.61%	Weekend conflict risk was reflected, but recovering physical flows limited the upside.
WTI	$70.75 +2.20%	Hormuz risk remains, but the market is not pricing a worst-case supply disruption.
U.S. Treasury Yields	Slightly higher	Less risk aversion and the wait for labor data limited further downside in yields.
Dollar	Slightly softer Still elevated	Risk aversion eased, but Fed caution and geopolitical risk limited dollar downside.

6. Semiconductors and AI: Technology Rebounded After Position Liquidation

AI demand remains, but debt and capex pressure remain as well

Technology and AI-related stocks rebounded on Monday. Recently, semiconductors and large-cap technology names had been shaken by AI investment costs, rising memory prices, and valuation pressure. But as Middle East risk eased and index flows improved, part of the prior selling pressure was reversed.

The important point is that this rebound does not mean AI-related risks have disappeared. AI data-center investment, rising memory costs, power infrastructure, debt funding, and depreciation remain unresolved. These are revenue opportunities for semiconductor and AI infrastructure companies, but they are capex and depreciation burdens for Big Tech.

Reuters recently noted that AI-related debt is taking a large share of investment-grade bond issuance, and hyperscalers such as Amazon and Alphabet are issuing bonds across multiple currencies. This means the AI investment cycle is no longer just an equity-market narrative. It is also changing the global credit and funding structure.

Therefore, today’s technology rebound is not the end of the AI-cost debate. More precisely, it is a partial recovery of technology positions that had been reduced last week, helped by easing Middle East risk and quarter-end flows.

[AI and Semiconductor Judgment]

Today’s technology rebound is not the removal of AI risk.
It is a partial recovery of positions that were cut too aggressively last week.
AI demand remains, but capex pressure, debt funding, and rising memory costs remain as well.
The market bought AI again, but it did not erase AI’s cost structure.

7. Interpretation: The Market Bought Delayed Risk, Not Risk Resolution

Middle East risk has declined, but AI cost pressure remains

The essence of today’s market is a rebound. But that rebound should not be overread. The Dow closed at a record high, and the Nasdaq rose sharply. But the background was closer to risk relief and positioning reversal than a new conviction in growth.

In the Middle East, the worst-case scenario was delayed. U.S.-Iran conflict moved toward a pause, and shipping flows through the Strait of Hormuz are recovering. But traffic has not fully normalized, while vessel-attack risk and insurance costs remain.

Oil shows this dual structure. Oil rose, but it did not surge. The market sees that risk remains, but it does not yet see worst-case supply disruption.

Technology stocks rebounded. But AI investment costs, debt issuance, rising memory prices, and Big Tech ROI concerns have not disappeared. The market did not solve these problems. It simply bought back technology exposure in the gap created by lower Middle East risk.

Therefore, the core sentence of today’s Daily is this.

The market did not buy peace. It bought time after escalation was delayed.

[System View Judgment]

U.S. stocks rebounded strongly.
But this rebound is the price of delayed risk, not the end of risk.
Hormuz is open, but not fully normalized.
AI-related stocks rebounded, but capex and debt burdens remain.
The next market is likely to be determined again by labor data, oil, Hormuz traffic, and technology-stock positioning.

8. Impact on Korea: Risk Appetite Can Recover, but Oil and Semiconductor Flows Need to Align

Korea will price both the U.S. technology rebound and easing Hormuz risk

This U.S. equity rebound is positive for Korea in the short term. The Dow closed at a record high, while the S&P 500 and Nasdaq also rallied strongly. The Nasdaq’s gain of more than 2% can directly improve sentiment toward Korean growth stocks and semiconductors.

However, Korea should not simply follow the U.S. index headline. The background behind this rebound is closer to a reversal of risk aversion than structural optimism. U.S.-Iran tension eased, the worst-case Hormuz blockade risk declined, and technology positions that had been aggressively reduced last week recovered partially.

The most important Korean variable is foreign flow into Samsung Electronics and SK Hynix. Because U.S. technology stocks rebounded, Korean semiconductor leaders have a better starting point. But the SOX selloff from last week, AI capex concerns, and final-demand worries caused by rising memory prices have not disappeared.

Oil is also mixed. If oil does not surge and remains around the low-$70 range, this is supportive for Korea. Energy import costs and airline and transportation cost pressure stay manageable. But if Hormuz traffic weakens again, or if oil quickly rises above $75, the won, import prices, and airline and transportation stocks face pressure.

Therefore, the Korean market has two core variables. First, whether the U.S. technology rebound translates into foreign buying of Korean large-cap semiconductors. Second, whether easing Hormuz risk actually leads to stable oil and a stable won. If both conditions align, Korea can receive a risk-appetite recovery. If either condition breaks, the rebound can be limited.

[Korea Market Impact] Implications for Korea

Korean Market Variable	Direction	System View Interpretation
Samsung Electronics and SK Hynix	Short-term supportive	The Nasdaq and technology rebound are positive. But AI capex and memory-cost concerns remain unresolved.
KOSPI	Risk appetite recovery	The U.S. index rebound and easing Middle East risk are positive for foreign risk appetite.
Korean Won	Conditionally stable	If oil does not surge and the dollar softens, the won benefits. Renewed Hormuz risk remains a burden.
Airlines and Transportation	Supportive	If oil stabilizes in the low-$70 range, fuel-cost relief expectations remain in place.
Refining and Energy	Mixed	Oil rebound is defensive, but supply-recovery expectations limit upside.
High-Multiple Growth Stocks	Selective rebound	The Nasdaq rebound helps, but labor data and renewed rate pressure remain risks.

[Korea Market Core Judgment]

This is a short-term supportive setup for Korea.
U.S. technology stocks rebounded, and Middle East escalation risk declined.
But semiconductors still carry AI cost-structure and positioning risks.
Today’s Korean market should focus on foreign flows into Samsung Electronics and SK Hynix, and whether the won stabilizes.

9. Today’s Checkpoints

The key is whether the Nasdaq rebound translates into Korean semiconductor flows

The first checkpoint is foreign spot flow into Samsung Electronics and SK Hynix. Since U.S. technology and AI-related stocks rebounded, Korean semiconductor leaders have a supportive starting point. But investors still need to confirm whether foreign buyers actually return to these large-cap memory names.

The second checkpoint is Strait of Hormuz traffic. The market did not conclude that Middle East risk is over. It only concluded that the probability of full escalation has declined. Tanker movement, insurance costs, and crude and LNG loading flows still need to be monitored.

The third checkpoint is oil. If Brent stays in the low-$70 range, this is supportive for Korea. But if it quickly rises above $75, it becomes a burden for the won, import prices, and airline and transportation stocks.

The fourth checkpoint is USD/KRW. If the U.S. stock rebound and dollar softness appear together, that is favorable for foreign flows. If the dollar strengthens again, Korea’s market reaction can feel weaker even with the U.S. technology rebound.

The fifth checkpoint is upcoming U.S. labor data. This week’s JOLTS and employment report can reset the Fed path. Once Middle East risk cools, the market’s focus moves back to jobs and rates.

[Today’s Checkpoints] Reference Lines to Watch

Checkpoint	Reference	System View Interpretation
Samsung Electronics and SK Hynix	Foreign net buying	Check whether the U.S. technology rebound translates into buying of Korean memory leaders.
Brent and WTI	Holding in the low-$70 range	If oil does not surge, Korea’s cost structure remains supported.
Hormuz Traffic	Tanker movement and insurance costs	If traffic continues, the Middle East risk premium remains limited.
USD/KRW	Won stability	If risk appetite recovery leads to won stability, foreign flows improve.
JOLTS and Employment Report	Pace of labor-market cooling	Jobs that are too strong raise rate pressure. Jobs that are too weak raise growth-slowdown concerns.

10. Secondary Issue: Behind the AI Rebound, Funding Risk Remains

Technology rebounded, but AI investment costs did not disappear

Monday’s technology rebound was strong. But the AI investment-cost issue remains. Recent AI data-center and cloud-infrastructure investment is no longer just capex. It is also reshaping bond markets and funding structures.

Hyperscalers are raising large amounts of debt to fund AI chips, cloud infrastructure, and data-center investment. Companies such as Amazon and Alphabet are tapping not only the U.S. market, but also euro, yen, Canadian dollar, Swiss franc, and sterling bond markets. This means AI investment has already moved beyond an equity-market narrative and into global credit markets.

This structure cuts both ways. If AI investment continues, semiconductors, memory, power infrastructure, and data-center companies benefit from demand. But for Big Tech, debt, interest costs, depreciation, and payback-period risk become larger issues.

Therefore, the AI-stock rebound should not be read as simple long-term optimism. The market bought AI demand again, but it did not erase AI investment costs. In the next earnings season, the market will focus not only on revenue growth, but also on profitability relative to capex.

[Secondary Issue Judgment]

AI-related stocks rebounded.
But AI investment costs did not disappear.
Hyperscaler debt issuance, capex, and depreciation remain key variables for the next earnings season.
The market bought AI demand again, but it did not erase AI’s cost structure.

11. Conclusion Summary

The essence of today’s market is not risk resolution, but reversal of risk aversion

U.S. stocks rebounded strongly on June 29. The Dow closed at a record high, while the S&P 500 and Nasdaq also gained sharply. The direct background was easing U.S.-Iran tensions and lower fears of a Strait of Hormuz blockade.

But this rebound should not be read as the end of Middle East risk. The market did not buy peace. It bought time after the probability of full escalation declined. Hormuz traffic is recovering, but it has not fully normalized, and oil still rose.

The rebound in technology and AI-related stocks was largely a reversal of last week’s selling. AI demand remains, but AI capex, data-center investment costs, Big Tech debt funding, and rising memory costs remain unresolved.

For Korea, the setup is supportive in the short term. The U.S. technology rebound, easing Middle East risk, and limited oil spike are positive for Korean risk assets. But the actual direction will likely depend on foreign flows into Samsung Electronics and SK Hynix, won stability, oil futures, and the wait for U.S. labor data.

System View conclusion: Today’s market did not buy the end of risk. It bought delayed risk and a reversal of positioning.

12. Key Questions

Does the U.S. stock rebound mean Middle East risk is over?

No. The probability of full escalation has declined, but Hormuz traffic and oil-price risk remain. This rebound is closer to a reversal of risk aversion than the complete removal of risk.

Is this positive for Korean semiconductors?

In the short term, yes. The Nasdaq rebound and improved technology flows are positive for Samsung Electronics and SK Hynix. But AI capex pressure, memory-cost concerns, and last week’s semiconductor liquidation still need to be monitored.

Is the oil rebound a burden for Korea?

At the current level, the burden is limited. If Brent and WTI stay in the low-$70 range, Korea’s cost structure is not heavily damaged. But if renewed Hormuz risk pushes oil rapidly above $75, the won and airline and transportation stocks face pressure.

Does the AI-stock rebound mark the start of another strong uptrend?

It is too early to say that. AI demand remains, but hyperscaler debt funding, capex, and depreciation pressure remain. This rebound has a strong element of position reversal after last week’s selloff.

What should Korean investors watch first today?

Foreign flows into Samsung Electronics and SK Hynix, USD/KRW, Brent and WTI, and whether Hormuz traffic remains open. The market also needs to price the upcoming U.S. labor data.

13. Related System View Reports

[Related System View Reports]

Oil, Yields, and AI Rally Risk
U.S. PCE, Apple Price Hikes, and Memory Price Impact on Korean Semiconductors
U.S. Long-Term Yields and Nasdaq Duration Risk
KOSPI AI Chip Rebound and Retail Leverage Risk

14. Sources and References

[Sources and References]

Reuters, “Wall Street ends higher as US, Iran attacks ease; major tech-related shares jump,” June 29, 2026.
Reuters, “Hormuz oil exodus sets stage for chaotic rebalancing act,” June 29, 2026.
Reuters, “Banks get creative and look further afield as AI-fueled debt soars,” June 29, 2026.
AP, “How major US stock indexes fared Monday 6/29/2026.”
U.S. Bureau of Labor Statistics, upcoming JOLTS and Employment Situation schedule.
Federal Reserve, public calendar and policy materials.

15. Disclaimer

This article is a macroeconomic and market interpretation based on publicly available data and market reports. It is not a recommendation to buy or sell any specific stock, ETF, bond, commodity, derivative, or financial product. All investment decisions and outcomes are the sole responsibility of the investor. Market data and forecasts are based on information available at the time of writing and may change depending on macroeconomic conditions, interest rates, oil prices, geopolitical variables, corporate earnings, semiconductor supply and demand, and exchange-rate movements.