A sharp rise in oil prices on renewed Middle East tensions pushed borrowing costs across Europe to levels not seen in more than a decade, reinvigorating inflation concerns and setting the scene for a potentially more hawkish tone at the European Central Bank meeting later in the day.
Markets reacted to a string of developments that tied energy security to broader financial conditions. Reports that Iran-aligned Houthi forces said they struck two Saudi oil tankers - part of a declared naval blockade on Saudi Arabia - raised the prospect of another chokepoint for global crude flows alongside Iran’s near-closure of the Strait of Hormuz. At the same time, U.S. forces conducted another series of strikes on Iran at the direction of President Donald Trump, marking the twelfth consecutive night of American attacks and provoking further Iranian retaliation.
The immediate market effect was pronounced. Brent crude climbed about 4% to approach $98 a barrel, moving the symbolic $100 per barrel level into view. The jump in oil fed into the cost of capital across the euro area: Germany’s 10-year bund yield moved above 3.2% - a level last seen during the euro-zone debt crisis in 2011 - underscoring how commodity shocks combined with geopolitical risk can rapidly translate into higher sovereign borrowing costs.
Equity markets in Europe were soft early in the session. A notable corporate disappointment arrived from STMicroelectronics, whose earnings prompted a steep share decline of roughly 15%, contributing to the cautious tone among investors. At the same time, market participants continued to absorb news that Alphabet plans to lift its AI-related capital spending by another $15 billion this year - a development that has reverberated across technology and semiconductor supply chains and was reflected in mixed moves for major tech stocks.
All of those forces sharpened focus on the ECB. Current market pricing implied only about a one-in-five chance of an additional rate increase at this meeting, but positioned investors to expect a higher probability of a move by September - roughly four-in-five. Michiel Tukker, senior rates strategist at ING, captured the tension in market expectations when he said:
"One could argue for a front-loaded hike today, but over previous years the ECB has always fully telegraphed any policy moves in advance."
In contrast to the caution in Europe, Asian markets generally moved higher as investors leaned into the view that the region stands to gain from the ongoing AI investment cycle. South Korea’s benchmark KOSPI jumped by more than 4% in Seoul, with memory heavyweight SK Hynix rising about 4.8% and Samsung Electronics up roughly 3.7%. Tokyo’s Nikkei and Hong Kong’s Hang Seng also registered modest gains.
Analysts noted a structural element to the divergence: while U.S. mega-cap technology firms may draw scrutiny as the originating spenders, chipmakers, memory suppliers and infrastructure vendors often capture revenues earlier in the investment cycle, providing more immediate earnings support for suppliers in markets such as South Korea. Charu Chanana, chief investment strategist at Saxo in Singapore, said:
"U.S. megacaps may face more scrutiny because they are writing the cheques, while chipmakers, memory suppliers and infrastructure companies get paid earlier in the investment cycle."
In currency markets, the euro climbed toward a one-week high near $1.1429 as traders positioned for the ECB meeting and the potential for indications of a September rate move. The Japanese yen, however, slipped back to a 40-year low against the dollar. A brief strength in the yen - prompted by a report that Bank of Japan officials were open to faster rate increases - quickly faded.
That short-lived shift in expectations for the BOJ had notable knock-on effects: Japan’s two-year government bond yield, a sensitive gauge of BOJ policy expectations, hit a 31-year high in Tokyo on the prospect of faster tightening. Tokyo’s finance minister responded with renewed verbal warnings about the exchange rate, saying the government stands ready to take decisive forex action as needed.
Societe Generale FX strategist Kit Juckes commented on the interplay between energy prices and domestic growth expectations in Japan, observing that higher oil costs have undermined hopes for a roughly 1.5% GDP growth target this year. His view highlights how commodity price swings can rapidly alter growth and currency outlooks, particularly for energy-importing economies.
Summary: Surging oil tied to renewed Middle East conflict pushed European bond yields to multi-year highs and intensified focus on the ECB meeting. Weak results from STMicroelectronics weighed on European equities, while Asian markets, led by South Korean chipmakers, rose on continued evidence of heavy AI infrastructure spending from big U.S. tech firms. Currency moves included a stronger euro ahead of the ECB meeting and a renewed slide in the yen to a 40-year low.
- Key sectors affected: Energy (oil), sovereign bond markets, semiconductors and AI infrastructure, and foreign exchange.
- Market positioning: Lower immediate odds of an ECB hike today but elevated probability for September; investors reallocating between risk regions amid differing sector impacts.
- Key points:
- Oil rallied about 4% toward $98 a barrel after Houthi strikes on Saudi oil tankers and renewed U.S.-Iran military exchanges.
- Germany’s 10-year bund yield moved above 3.2% for the first time since 2011, lifting euro-zone borrowing costs.
- Asian equity markets rose with South Korea’s KOSPI surging over 4%, led by gains in SK Hynix and Samsung Electronics, supported by increased AI-related spending from U.S. tech firms.
- Risks and uncertainties:
- Escalation in Middle East hostilities could further lift oil prices, amplifying inflation pressures and pushing bond yields higher - impacting sovereign borrowing costs and interest-rate-sensitive sectors.
- Corporate earnings surprises, such as the steep fall in STMicroelectronics shares after its results, can weigh on market sentiment in specific sectors, particularly semiconductors and related supply chains.
- Volatility in Japanese policy expectations could trigger further yen weakness or prompt official intervention, with implications for exporters and global currency markets.