As of 6:00 a.m. UTC on Monday, May 4, 2026

TL;DR

  • China issued a formal order for the first time ever, directing companies to ignore US sanctions targeting five domestic oil refiners, a major escalation in the US-China economic standoff.
  • Asia stocks climbed 2.2% toward all-time highs, led by chipmakers TSMC (+6.6%) and SK Hynix (+11%), on strong AI-driven megacap earnings.
  • S&P 500 and Nasdaq 100 futures both gained ahead of the US open; Wall Street closed at record highs on Friday.
  • A tanker was struck by projectiles 78 nautical miles north of Fujairah, UAE, according to the UK Maritime Trade Operations (UKMTO).
  • Brent crude whipsawed, falling as much as 2.4% before erasing those losses, last trading around $108 per barrel.
  • Bitcoin rose roughly 1% to near $79,800. Gold edged lower to around $4,600 per ounce.

What Happened

Two separate developments broke over the weekend and early Monday, pulling markets in competing directions.

On Saturday, China's Ministry of Commerce invoked its so-called Blocking Rules for the first time in history, ordering domestic companies not to comply with US sanctions targeting five Chinese petrochemical firms accused of purchasing Iranian crude oil. The move is a direct counter to Washington's effort to cut off Iranian oil revenues through secondary sanctions, meaning penalties aimed at foreign companies that do business with sanctioned Iranian entities.

Beijing's use of Blocking Rules signals a significant shift in posture. Previously, Chinese firms informally complied with US sanctions to protect their access to the US financial system. With this directive, the Chinese government is formally requiring them to maintain those commercial relationships regardless, putting Chinese banks and companies at risk of US secondary penalties while daring Washington to act on them.

Separately, Asian equity markets opened Monday on a sharply positive note, with the MSCI Asia Pacific index advancing 2.2% and approaching the all-time high set on February 27, just before the US-Iran conflict began. South Korean and Taiwanese benchmark indices both gained more than 4.5%, driven largely by chipmaker optimism. Taiwan Semiconductor Manufacturing Co. (TSMC) rose 6.6% and South Korea's SK Hynix surged 11%, reflecting strong demand signals from last week's US megacap tech earnings season. About 81% of S&P 500 companies beat first-quarter earnings expectations, according to Bloomberg data.

Meanwhile, the Strait of Hormuz situation remained tense. UKMTO reported that a tanker was struck by unidentified projectiles approximately 78 nautical miles north of Fujairah in the UAE. President Trump announced that the US would begin guiding stranded cargo ships through the strait starting Monday, under what he described as an effort to "free" vessels caught in the ongoing blockade zone. A senior Iranian official responded by warning that any US interference in the strait would constitute a breach of the fragile ceasefire currently in effect.

Why Markets Moved: China Sanctions Defiance and AI Rally

The AI and earnings trade is carrying the bulk of Monday's equity momentum. Markets have spent the past month largely setting aside concerns about the Middle East conflict, with corporate earnings resilience, particularly from US technology, providing a strong underlying bid. Global equities delivered their best month since 2020 in April, with US stocks notching five consecutive weeks of gains into the close.

The China sanctions escalation is a secondary factor for equities this morning but a primary one for oil and financial sector risk. The Blocking Rules directive effectively keeps Iranian crude flowing into five major Chinese refiners regardless of US pressure, which could add to global oil supply at the margin over time. However, the near-term response was modest, with Brent crude whipsawing on competing signals: a bullish read from the tanker attack and Hormuz tensions, offset by a slightly bearish read on Iran oil supply continuing via China.

The yen briefly jumped 0.8% against the dollar before paring gains to around 0.2% stronger at 156.72, a move traders are watching closely following last week's reported Bank of Japan intervention near the 157 level.

Implications for Traders

Stock and futures traders: The AI earnings catalyst is the dominant driver for now. US futures are green and the technical backdrop is constructive. The main risk is a sudden escalation, either from the Hormuz ceasefire breaking down or from a US response to China's Blocking Rules that hits banking or financial channels. For the near term, the momentum is with bulls, but position sizing around geopolitical risk remains warranted.

Energy and oil traders: Brent and WTI are caught between two competing forces. A supply disruption from Hormuz closure or further tanker attacks is bullish for oil. But if China successfully shields its refiners from sanctions and Iranian crude continues flowing, that adds medium-term supply. The choppy $100-$110 range on Brent reflects this tension. Watch for any confirmation that Trump's ship-guiding plan gets a hostile response from Iran, which could send oil sharply higher.

Crypto traders: Bitcoin is trading near $79,800, up roughly 1% on the day. The broader risk-on tone in Asian equities is providing modest support. No crypto-specific catalyst is driving the move; BTC is largely tracking global risk sentiment. Gold is slightly weaker, suggesting safe-haven demand is being displaced by the equity rally.

Potential Positives vs Negatives from This Catalyst

Potential positives:

  • If earnings momentum continues and Q2 guidance from US tech companies holds up, the AI trade rally could extend through the summer. Asian chipmakers are particularly exposed to upside.
  • If the US-guided ship convoy through Hormuz proceeds without incident, it could reduce oil market uncertainty and narrow the geopolitical risk premium in Brent crude.
  • A Trump-Xi meeting (reportedly being discussed ahead of the US-China trade calendar) could introduce a diplomatic off-ramp that reduces the risk of the sanctions standoff escalating into banking-sector penalties.

Potential negatives:

  • If the US responds to China's Blocking Rules with secondary sanctions on Chinese banks, the financial system shock could be severe, potentially forcing global banks to choose sides and disrupting dollar-clearing for Chinese institutions.
  • Iran's warning that US interference in Hormuz constitutes a ceasefire breach raises the probability of fresh military escalation, which would push oil above $115 and hurt equity sentiment sharply.
  • The yen's volatility near 157 is a signal that carry trades are fragile. A rapid yen rally could trigger forced unwinds across equity markets, particularly in tech and growth names.

What Could Happen From Here

Base case (most likely, 50-60%): The AI earnings tailwind sustains equities through the week. The Hormuz convoy proceeds with limited incident. China's Blocking Rules declaration remains a diplomatic flashpoint but does not immediately trigger US secondary sanctions on Chinese banks. Oil stays in the $105-$112 range. Bitcoin consolidates near current levels.

Confirmation: No retaliatory Iranian action against the US convoy; no US Treasury announcement targeting Chinese financial institutions; continued S&P 500 strength into the week.

Upside case (20-25%): Diplomatic progress between the US and Iran reduces Hormuz risk. Trump-Xi talks are confirmed, easing sanctions escalation fears. Tech earnings beat expectations through mid-May. TSMC and AI-adjacent names lead a sustained rally. Bitcoin reclaims $85,000 as risk appetite improves broadly.

Confirmation: Ceasefire talks resume and a timeline for Hormuz reopening is announced; Trump-Xi bilateral meeting confirmed; TSMC forward guidance raises estimates.

Downside case (20-25%): Iran retaliates against the US convoy, escalating the conflict and spiking Brent crude above $120. The US responds to China's Blocking Rules by sanctioning major Chinese banks, triggering a global credit market shock. Yen breaks below 155 rapidly on BOJ intervention, unwinding carry trades. Equities fall sharply; Bitcoin drops back toward $70,000.

Confirmation: UKMTO reports US naval vessel attacked or harassed; US Treasury targets a Chinese state bank; USD/JPY drops more than 1% in a single session.

What to Watch Next 24 Hours

  • Hormuz convoy: Any report of Iran engaging with or threatening US-guided ships will be the key market mover of the day.
  • US Treasury: Watch for any statement regarding secondary sanctions response to China's Blocking Rules directive.
  • USD/JPY: The 157 level remains a key trigger. A break below 155 would signal renewed BOJ intervention pressure.
  • Oil prices: Brent intraday range will determine whether the geopolitical premium is being priced in or faded by the market.
  • US market open: Watch S&P 500 and Nasdaq 100 cash open for confirmation that Friday's momentum carries into Monday.

Sources

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Header image source: wikimedia by Calistemon. License: CC BY-SA 4.0.