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Convergent Chokepoints: $100 Oil, 60-Country Tariffs, and Taiwan's Gray-Zone Threshold

Blue Horizon · ·9 min read
Aerial view of a small deserted sea islet in calm blue waters, evoking the strategic waterways of the Red Sea region
Photo by Francesco Ungaro on PexelsPhoto by Ekaterina Belinskaya on PexelsPhoto by lucas hegaard on Pexels

Less than a month ago, the dominant story in oil markets was a looming glut. Tanker traffic through the Strait of Hormuz was recovering after a brief US-Iran ceasefire, non-OPEC supply was rising, and analysts expected softer prices.[1] That narrative has been obliterated. Three geopolitical chokepoints are closing at once, and the market is only beginning to price what that means.

The Hormuz Squeeze

Brent crude surged 5.76% in the most recent session to briefly punch through $100 a barrel before easing, while WTI gained 6.81%.[2] The rally was triggered by Iran-backed Houthi militants claiming attacks on Saudi oil tankers in the Red Sea — the route Saudi Arabia had been using to bypass the Hormuz blockade.[2] Brent has now returned to $100/bbl after a brief pause during the Hormuz “ceasefire,” with ICIS estimating that 25% of global oil output is now impacted by war.[3]

The scale of disruption is unlike anything seen in decades. Wood Mackenzie tracking data shows crude exports from the Middle East Gulf fell 82% between January and June — from an average of 18.8 million barrels per day across 370 cargoes to just 3.4 million barrels per day across 71 cargoes.[2] Traffic through the Strait of Hormuz, which carried 11.4 million barrels a day of crude capacity in January, “effectively ceased” after US-Israel strikes on Iran on February 28.[2] By early July, large crude carrier movements had only partially recovered to roughly 4.4 vessels per day, with Suezmax outbound transits at zero and freight rates running at roughly triple pre-conflict levels.[2]

For producers with no pipeline bypass, the situation is dire. Iraq, which exported 3.77 million barrels a day in January, recorded zero exports by June. Kuwait and Qatar followed the same path from April.[2]

Saudi Arabia had been the workaround — diverting flows through its East-West Petroline to the Red Sea terminal at Yanbu, which handled 98.6% of Saudi lifings by June.[2] But even that route is now failing. Houthis declared a naval blockade targeting Saudi Arabia, and on July 26, Al Jazeera reported Houthi forces fired missiles and drones at two of Saudi Arabia’s most strategically important oil facilities on the Red Sea.[1] Yanbu volumes are already down 41% from their March peak.[2]

As Ian Solis, data analyst at Wood Mackenzie, put it: “For months, the market treated Yanbu as the answer to Hormuz risk. The problem is that Yanbu has its own chokepoint. If Bab al-Mandeb comes under sustained disruption from a declared Houthi naval blockade, Asia stands to lose a major crude supply artery. What looked like diversification was in reality a shift from one strategic bottleneck to another.”[2]

The Refined Products Squeeze

Close-up of a fuel pump showing gasoline and diesel options at a gas station

The crisis in refined products is even tighter than in crude. Susan Bell, senior vice president of downstream research at Rystad Energy, noted that when the Iran war started, there were 4.4 billion barrels in commercial and strategic crude oil stockpiles, but inventories of products like gasoline, diesel and jet fuel only totaled about 1.4 billion barrels.[4] Both have since been drawn down by 200 million barrels each, leaving far less margin for refined products.[4]

The US gasoline crack spread has exploded from about $8 a barrel at the start of the war to $40-$50 today.[4] Russian refinery runs have tumbled to 3.8 million barrels per day — a 21-year low versus 6.8 million barrels per day of nameplate capacity — as Ukrainian drone strikes hit refineries as far as Omsk, 2,500 km from the Ukrainian border.[3] Moscow has banned product exports to preserve domestic supply, further tightening the global diesel market.[4]

Insurance costs have spiked in parallel. War-risk premiums for very large crude carriers have jumped from 1-3% of hull value earlier in July to 7.5-10% today, according to S&P Global — pushing the insurance cost for a single VLCC carrying 2 million barrels of oil at $100/bbl to roughly $20 million.[3]

Helima Croft, head of global commodity strategy at RBC Capital Markets, described the emerging “no way out” scenario: “So we are starting to talk about the kind of no way out scenarios because of this new Red Sea unrest.”[4] Dan Pickering, founder of Pickering Energy Partners, warned that if both Bab al-Mandeb and the Strait of Hormuz are nearly shuttered, oil prices could rise back near the late-April high of $124 per barrel in August. “We don’t have multiple months because we’re already starting from a tougher spot. It’s going to be on us pretty quickly.”[4]

The Tariff Wall Rebuilds

Large cargo ship loaded with colorful shipping containers at a bustling industrial port

Even as the oil shock deepens, the trade policy front is heating up again. On July 24, the Trump administration imposed double-digit tariffs — either 10% or 12.5% — on more than 60 countries, using Section 301 of the Trade Act of 1974.[5] The new levies took effect just as temporary 10% worldwide tariffs expired Friday, replacing stopgap duties that were themselves a replacement for the emergency tariffs the Supreme Court struck down in February.[5]

The legal framework matters. Section 301 allows the president to levy import taxes without going to Congress, and trade lawyers say the tariff mechanism is designed to be permanent — countries would need to prove they are enforcing forced-labor import bans to Washington’s satisfaction before the tariffs would be removed.[5] As Patrick Childress, a partner at Holland & Knight and former US trade official, put it: “This suggests that no short-term path for countrywide relief from the new Section 301 tariffs will be available.”[5]

The affected countries account for 99% of US imports.[5] Brazil, facing a 12.5% tariff, called the move “arbitrary and unjustified.” Australia questioned the justification for its own 12.5% rate.[5] Scott Lincicome of the Cato Institute called the evidence base “pretty laughable on its face,” noting it is hard to argue countries like Norway or Switzerland aren’t doing enough to police forced labor.[5]

Meanwhile, China has retaliated against the EU by banning 14 European Union entities from accessing dual-use goods — a direct retaliation for the EU’s 21st sanctions package against Russia-linked firms.[6] The tit-for-tat pattern is widening the trade conflict beyond the US-China bilateral into a multilateral fragmentation.

China’s Gray-Zone Threshold

While the oil and tariff stories dominate market attention, a quieter escalation crossed a new threshold in the Taiwan Strait. On July 22, Taiwan’s Ministry of National Defense detected Chinese military helicopters and drones crossing the Taiwan Strait median line for the first time — operating in Taiwan’s restricted airspace for hours.[7] Chieh Chung, a deputy researcher at Taiwan’s National Defense and Security Research Institute, described it as a new phase: “It is the first time that a Chinese military helicopter has been confirmed to cross the median line and enter Taiwan’s restricted airspace in the central and northern Taiwan Strait.”[7]

Retired Colonel Wang Peiru, a Taiwanese military expert, assessed that “the Chinese military is strengthening its helicopter capabilities to transport troops and equipment from the mainland to Taiwan, with a potential invasion in mind.”[7] Some analysts speculated the helicopter may have been deployed to monitor the USNS Henson, a US Navy oceanographic survey vessel transiting the strait at the time.[7]

By July 25, Taiwan recorded 29 PLA aircraft sorties in a single day, with 17 crossing the median line into Taiwan’s air defense identification zone.[8] China also conducted live-fire drills in the Taiwan Strait.[8] The pattern matters: each new crossing normalizes a higher baseline of Chinese military activity around Taiwan, dulling regional vigilance and expanding the range of operations Beijing can conduct without provoking a crisis response.[8]

The Market Tell

The macro backdrop is not cooperating with the geopolitical risk premium. The 10-year Treasury yield stands at 4.71%, up 21 basis points on the month.[9] CPI inflation is at 3.46% year-over-year — already above the Fed’s 2% target and now facing an oil shock that could push it higher.[9] Consumer sentiment has collapsed to 44.8, down 14.2% year-over-year and falling 10 points in a single month.[9] The Fed funds rate sits at 3.63%, giving the central bank limited room to ease if energy-driven inflation resurges.[9]

Equities are showing the strain. The S&P 500 closed at 7,411.98 on Friday, up just 0.05%, while the Nasdaq dropped 0.64%.[10] The S&P 500 logged its second straight weekly decline.[10] Brent crude fell 3.9% on Friday, snapping a four-day rally — but the pullback looked more like profit-taking than a regime change, given oil had surged for four straight sessions before that.[10]

Trump has paused nightly military strikes on Iran after 13 consecutive days of action, opting to maintain a naval blockade while signaling a preference for a diplomatic “deal.”[6][1] But Rystad Energy has raised the probability of no US-Iran deal to 55%.[6]

Prediction markets offer a more nuanced read. Polymarket traders put the probability of Hormuz traffic returning to normal by July 31 at just 45.5%, though that rises to 75.5% by December 31.[11] A US-Iran permanent peace deal by year-end is priced at 63.5%.[11] The probability of a US invasion of Iran before 2027 sits at 21%.[11] An Oxford Economics briefing found betting markets signal a 72% probability of Iran introducing Hormuz transit fees by year-end — a structural cost that would persist even after the conflict ends.[2]

Julius Baer’s Norbert Ruecker argues the spike is overdone: “None of the involved conflict parties have an interest in the situation getting out of hand. We remain confident that prices will follow the usual geopolitical pattern and that the current spike will prove short-lived.”[2] But even Julius Baer has shifted its natural gas outlook to Cautious.[2]

What to Watch Next

  • Hormuz and Bab al-Mandeb transit data. The July 31 Polymarket contract on Hormuz normalization is a coin flip at 45.5%.[11] Watch VLCC and Suezmax transit counts — if both remain near zero into August, the refined products squeeze will intensify.

  • Saudi response to Red Sea attacks. The Houthi strikes on Saudi oil facilities at Bab al-Mandeb are the newest escalation.[1] If Saudi Arabia cannot maintain Yanbu as a bypass route, there is no remaining alternative for Gulf crude exports.

  • Section 301 tariff implementation and retaliation. The tariffs are designed to be permanent.[5] Watch for whether major trading partners retaliate — China’s ban on 14 EU entities is a template.[6]

  • Crack spread widening. US gasoline crack spreads have gone from $8 to $40-50/bbl.[4] If refined product inventories continue drawing down at the current pace, the consumer-level impact will show up in CPI data within 1-2 months.

  • Taiwan Strait activity levels. The median-line crossings by helicopters and drones represent a new capability threshold.[7] Watch whether next week’s PLA sortie count exceeds the 29-aircraft level seen July 25.[8]

  • Fed communication. With CPI at 3.46% and the 10-year at 4.71%,[9] the Fed faces a classic dilemma: an oil-driven inflation impulse hitting an economy where consumer sentiment has already collapsed to 44.8.[9] Any hawkish shift in Fed language would compound the risk-off pressure.

Sources

  1. Mideast oil may soon have no way out amid wars, but the crisis in refined products is eve…fortune.com
  2. Oil markets brace for prolonged squeeze as Hormuz blockage deepens | Khaleej Timeskhaleejtimes.com
  3. Brent returns to $100/bbl, with 25% of global oil output now impacted by war – Chemicals…icis.com
  4. Mideast oil may soon have no way out amid wars, but the crisis in refined products is eve…fortune.com
  5. Dissecting Trump’s new tariffsbostonglobe.com
  6. This Month in Geopolitics: July 2026dbresearch.com
  7. Chinese Military Deploys Helicopters, Drones in Taiwan Airspacechosun.com
  8. China & Taiwan Update, July 24, 2026 | ISWunderstandingwar.org
  9. FRED: UnemploymentFN2 market data
  10. S&P 500 closes little changed Friday as Iran fears and chip ...cnbc.com
  11. Will the US officially declare war on Iran by December 31, 2026?FN2 market data