A man looks at a stock quotation board showing the Nikkei share average outside a brokerage in Tokyo, Japan, on Jun 15, 2026. (File photo: Reuters/Kim Kyung-Hoon)

Asian markets temper US-Iran deal optimism as oil prices plunge

Oil prices, which finished at a three-month low overnight, reflected the cautious stance, with Brent crude futures sliding 0.3 per cent to US$82.96 a barrel.

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SINGAPORE: Asian stocks made cautious gains on Tuesday (Jun 16) after a rally in the previous session on news of a US-Iran peace deal, while investors assessed a widely expected Bank of Japan rate increase to a 31-year high.

The Nikkei 225 jumped 0.6 per cent, briefly crossing above the 70,000 mark to set an all-time peak after the Japanese central bank voted 7-1 to hike its benchmark policy rate to 1 per cent, levels last seen in 1995. Against the dollar, the yen was flat at 160.31.

S&P 500 e-mini futures were trading down 0.1 per cent after fluctuating between gains and losses, while MSCI's broadest index of Asia-Pacific shares outside Japan was up 0.4 per cent, with Korean shares rising 2 per cent.

Stocks in Hong Kong weighed on the benchmark after weaker-than-expected retail sales and fixed-asset investment data from China. 

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Markets settled into a more measured tone on Gulf developments as the initial excitement over the preliminary agreement between Washington and Tehran began to fade.

Oil prices, which finished at a three-month low overnight, reflected the cautious stance, with Brent crude futures sliding 0.3 per cent to US$82.96 a barrel. Shippers in Asia and Europe said rebuilding confidence in resuming transit through the Strait of Hormuz could take weeks.

While US President Donald Trump's announcement of a deal with Iran drew initial investor relief on Monday, it also puts Washington on a collision course with Israel. 

"While it is an important diplomatic breakthrough that should remove a key source of market volatility, the durability of the deal is likely to be tested in the future," Westpac analysts wrote in a research note. "Many sticking points, including the fate of Iran’s nuclear programme, were left to be resolved in subsequent negotiations."

WALL STREET RALLY

Overnight on Wall Street, stocks and bonds rallied on optimism over the deal. The S&P 500 jumped 1.7 per cent, and the Nasdaq Composite surged 3.1 per cent, while the Dow Jones Industrial Average and the STOXX 600 both closed at record highs.

Beyond geopolitics, traders are also awaiting a press briefing from Bank of Japan Deputy Governor Shinichi Uchida to explain the central bank's decision, which Governor Kazuo Ueda will miss due to medical treatment.

"We do not anticipate any major changes to the Bank’s assessment of current conditions," analysts from Mitsubishi UFJ wrote in a research note. 

"We expect Deputy Governor Uchida’s press conference, including the rationale he presents for the rate-hike decision, will be based largely on Governor Ueda’s Jun 3 speech," the note added. "Mr Uchida is also likely to follow the governor’s remarks when discussing future policy decisions."

The US dollar index, which measures the greenback's strength against a basket of six currencies, was up 0.1 per cent at 99.75, firmly within the tight trading channel in which it has sat for the past three sessions.

The yield on the US 10-year Treasury bond was up 0.8 basis points at 4.475 per cent. Gold moved 0.4 per cent higher at US$4,324.32.

In early European trades, pan-region futures were flat, German DAX futures were 0.2 per cent lower, and FTSE futures were down 0.1 per cent.

In cryptocurrency markets, bitcoin was down 0.8 per cent at US$65,799.61, while ether slumped 2.1 per cent to US$1,762.15.

Source: Reuters/rk

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