SoftBank Group (9984.T-JP) surged more than 12% on Monday – topping Asia’s tech leaderboard – after Washington and Tehran signed a memorandum of understanding to end their military conflict and reopen the Strait of Hormuz toll-free, triggering a broad risk-on wave across global markets.
For long-horizon investors, the deal’s most consequential effect may be structural: a sustained fall in energy costs and restored shipping routes could reduce input-cost headwinds for the technology supply chain that stretches from Tokyo to Seoul to Taipei, potentially lifting margins across the sector for quarters to come.
Key Takeaways
- SoftBank rose 12%+, the top Asia tech gainer Monday.
- U.S.-Iran MOU signed electronically; formal ceremony set for June 19.
- Oil slid below $84/barrel; Strait of Hormuz to reopen toll-free.
Market Reaction & Context
SoftBank’s 12%-plus advance dwarfed the broader Japanese benchmark: the Nikkei 225 closed 5% higher at a record intraday finish of 69,317.50, while the Topix rose 2.43% 1. Among semiconductor-linked names, Tokyo Electron added 9.19% and Advantest gained 7.69% – both still well behind SoftBank’s headline move but still among the sharpest single-day prints for those stocks in months 2.
Across the Korea Strait, the Kospi surged 5.2% to 8,545.98, powered in part by memory-chip heavyweights: Samsung Electronics climbed 4.65% and SK Hynix gained 6.42% 2. Taiwan Semiconductor Manufacturing Co (TSM) rose 2.16%, while Foxconn (Hon Hai Precision) added 2.5%, suggesting the rally broadened well beyond Japan.
The Geopolitical Catalyst
President Donald Trump confirmed on Sunday via Truth Social that “The Deal with the Islamic Republic of Iran is now complete,” authorising the toll-free opening of the Strait of Hormuz and the simultaneous removal of the U.S. naval blockade 3. Pakistan’s Prime Minister Shehbaz Sharif, who served as mediator between the two countries, said both sides declared “immediate and permanent termination of military operations on all fronts,” with a formal signing ceremony scheduled for Friday, June 19, in Switzerland.
A senior Trump administration official told CNBC that the memorandum was signed electronically on Sunday and that Iran will receive no economic benefits from the deal until it takes verifiable action on its nuclear programme 3. The official added that a significant increase in ships transiting the strait is expected within two weeks, though full normalisation of traffic may take longer.
Ripple Effects Across Asset Classes
Oil prices bore the sharpest immediate adjustment: U.S. crude futures fell 4.8% to around $80.80 per barrel shortly after the announcement, while Brent crude dropped 3.9% to roughly $83.89 per barrel – dragging below $80 for the first time since the conflict began, according to CNBC data 3. European energy majors reflected the repricing, with Var Energi falling 7.3%, TotalEnergies tumbling nearly 5.8%, BP losing 4.4%, and Shell slipping 4.3% 3.
On Wall Street, the S&P 500 jumped 1.65% to 7,554.29 and the Nasdaq Composite advanced 3.07% to 26,683.94, while the Dow Jones Industrial Average added 468.77 points, or 0.92%, to a record close of 51,671.03 3. DoorDash (DASH) – cited by Bank of America Securities analyst Justin Post as “best positioned to benefit from ME conflict resolution” given its fuel-cost exposure – rallied more than 11% on the session 3.
Analyst Perspective
“We think the potential of a more severe gas price impact has been a modest sector overhang. However, we think DoorDash, down 15% since February 27, has had the largest margin overhang in the group, and is best positioned to benefit from ME conflict resolution. Reiterate Buy,” said Justin Post, research analyst at Bank of America Securities 3.
Barclays separately said Monday that a gold correction now underway looks “more like a reset than a break in the longer-term case,” pointing to the stronger dollar and equity market combination as drivers of the precious metal’s sell-off rather than any structural weakening of safe-haven demand 3. Gold briefly touched $4,390.8 per ounce, its highest since June 5.
What Long-Horizon Investors Should Watch
For investors assessing durability, the key variable is whether the MOU translates into a lasting geopolitical settlement – or merely a temporary ceasefire that markets have already priced in. The deal’s condition that Iran must act first on its nuclear programme before gaining economic relief introduces significant execution risk that could reverse some of Monday’s enthusiasm.
SoftBank’s gain is also partly a function of its concentrated exposure to technology venture capital and AI-linked assets: a lower-oil, lower-risk-premium environment historically correlates with higher multiples for growth assets, the category that defines SoftBank’s Vision Fund portfolio. Investors tracking the company should monitor whether the broader risk-on tone sustains as technical negotiations over the Hormuz reopening proceed.
Not investment advice. For informational purposes only.
References
1CNBC (June 15, 2026). “SoftBank surges more than 12% as Iran-U.S. peace deal sends Asia stocks soaring”. X (formerly Twitter). Retrieved June 15, 2026.
2CNBC (June 15, 2026). “SoftBank surges more than 10% as Iran-U.S. deal sends Asia tech stocks soaring”. LinkedIn. Retrieved June 15, 2026.
3Conlon, S., Harring, A., Lee, J. et al. (June 14, 2026). “Dow climbs more than 450 points for record close as oil tumbles on potential Iran deal”. CNBC. Retrieved June 15, 2026.
4ABP Live / The True Story (June 15, 2026). “Share Markets Celebrate US-Iran Peace Deal: Sensex Over 700 Points Up, Nifty Above 23,850”. The True Story. Retrieved June 15, 2026.
5ANC 24/7 (June 2026). “Asia stocks surge on U.S.-Iran peace hopes, tech rebound”. YouTube / ANC. Retrieved June 15, 2026.