Hormuz Strait Reopening Uncertain Despite US-Iran De-escalation Signals

*Editor's Note: 'AI PRISM' (Personalized Report & Insight Summarizing Media) is an AI-based customized news recommendation and summarization service developed with support from the Korea Press Foundation. It selects and delivers six tailored news items for each reader type.

1. 'Self-Declared Victory' Brings Ceasefire to the Doorstep, but Hormuz Reopening Far from Guaranteed

- Key Summary: President Trump set a two-to-three-week deadline for ending military operations against Iran, and Iranian President Pezeshkian stated he is "willing to end the war," rapidly raising ceasefire expectations. Brent crude plunged from near $120 to below $100 intraday, and all three major New York stock indexes posted their largest gains since October last year. However, military tensions persist as the IRGC named Apple, Google, and JPMorgan among potential US corporate targets, while the US dispatched a third aircraft carrier to the Middle East. With the timeline for lifting the Hormuz Strait blockade uncertain and the White House reportedly preparing for the possibility that oil prices remain above $100 for the time being, analysts say it is premature to conclude that energy risks have been resolved.

2. US Demands Lower Trade Barriers Despite $350 Billion Investment Pledge — Section 301 Tensions Rise

- Key Summary: The USTR significantly expanded Korea-related content in its 2026 NTE report from seven to 10 pages, designating the prohibition on exporting high-precision maps, discrimination against foreign firms in AI infrastructure procurement, the suspension of US-grown rice sales, and soybean import restrictions as trade barriers. The report notably raised the pressure by newly taking issue with the requirement to establish domestic data centers as a condition for high-precision map export permits. Despite Korea's pledge of $350 billion in investment last year, the US offensive has intensified. As the NTE report serves as the basis for Section 301 trade investigations, the outcome of the upcoming Korea-US FTA Joint Committee meeting is expected to be a watershed moment for trade risks, analysts say.

3. Nvidia Invests $3 Trillion Won in Marvell to Connect Big Tech's Custom Chips

- Key Summary: Nvidia invested $2 billion (approximately 3 trillion won) in Marvell Technology, a custom AI semiconductor design specialist, and established a strategic partnership. The two companies plan to combine Nvidia's chip interconnect technology, NVLink Fusion, with Marvell's custom AI chips to build a system that integrates big tech companies' in-house designed chips into Nvidia's infrastructure. The partnership also includes collaboration in silicon photonics, a technology that transmits data using light instead of electrical signals. Analysts say this is a strategy to maintain Nvidia's AI computing dominance by drawing into its ecosystem even big tech firms that have been adopting custom chips as alternatives to expensive GPUs.

4. Middle East Crisis Drives Tanker Premiums Higher — Mid-Sized Shipbuilders See Rapid Growth

- Key Summary: With the prolonged Hormuz Strait blockade driving a surge in tanker demand, Daehan Shipbuilding has won orders for 12 Suezmax-class tankers worth approximately 1.56 trillion won this year alone, capturing 15% of global crude carrier orders. As VLCC availability has dried up, Suezmax tankers suited for alternative routes have emerged as the preferred option, with newbuilding prices expected to surpass $90 million in the second quarter. Notably, the phenomenon of secondhand vessel prices exceeding newbuilding prices has appeared for the first time since the 2007 tanker super-cycle, indicating the level of market overheating, analysts say. Securities firms estimate Daehan Shipbuilding's operating profit will reach 351.8 billion won this year with an operating margin of 26%.

5. KOSPI Surges 8% — Retail Investors Ask "Will It Rally Again Tomorrow?" Securities Firms Urge Caution: "Check These Indicators First"

- Key Summary: Fueled by US-Iran ceasefire expectations, the KOSPI surged 8.44% (426.24 points) to close at 5,478.70, triggering a buy-side sidecar during the session. Semiconductor stocks led the rally, with Samsung Electronics (005930.KS) jumping 13% and SK hynix (000660.KS) rising more than 10%, while construction (up more than 12%) and electronics (up more than 11%) also surged across the board. However, the financial investment industry advises that confirmation of "real economy indicators" — including Hormuz Strait tanker traffic, changes in maritime insurance premiums, and energy price stabilization — must come first. Mirae Asset Securities (006800.KS) counseled that "this reflects expectations of risk mitigation, not risk resolution," recommending strategic patience over chasing rallies.

6. The Power of Semiconductors — March Exports Hit Record $80 Billion-Plus

- Key Summary: March exports rose 48.3% year-on-year to $86.13 billion, setting a monthly record, while the trade surplus also reached an all-time high of $25.737 billion. Semiconductor exports surged 151.4% to $32.8 billion, accounting for 70% of total export growth, with DDR4 prices soaring 863% and NAND flash prices rising sevenfold, as both unit prices and volumes continued to climb. Exports to China rose 65% to $16.5 billion while exports to the US grew 47.1% to $16.3 billion, with both major markets showing balanced growth. However, analysts note that the Hormuz Strait closure has caused a 7% decline in energy imports and triggered petroleum product export controls, making a decline in petrochemical export volumes inevitable going forward.