Goldman Sachs: Dark Fleet Surge at Hormuz Creates 5M bpd Blind Spot in Persian Gulf Crude Exports
nashnova research
Goldman Sachs estimates Persian Gulf oil exports have recovered to 15–16 million b/d, yet visible tanker data shows only about 10 million — roughly 5 million barrels a day are moving off the radar, suggesting the market may already be over-pricing the supply shock.
Where did 5 million barrels a day go?
Goldman strategist Yulia Zhestkova Grigsby's team notes Persian Gulf actual exports sit at roughly 15–16 million b/d, about two-thirds of pre-conflict levels.
Visible tanker tracking (seven-day moving average) registers only about 10 million b/d — leaving a gap of roughly 5 million b/d.
This means → about one in every three barrels transiting the Strait of Hormuz is invisible to conventional shipping data, and traditional trackers are systematically missing real supply.
What are "dark transits" — and why the sudden surge?
Dark transit refers to oil tankers switching off their AIS — automatic identification system, the beacon that makes a vessel visible on public shipping trackers — while passing through the Strait of Hormuz.
Goldman's explanation is straightforward: tankers are going dark to avoid Iranian tracking and interception.
This reflects a deeper signal — Iran's effective control over this strategic chokepoint has materially weakened; shipowners would rather go invisible than risk being stopped.
Are inventory figures being under-counted too?
Revising the dark-transit volume upward mechanically raises the estimate of floating storage — crude sitting on tankers at sea, not yet offloaded.
After adjustment, Goldman puts visible global inventories roughly 39 million barrels above raw readings, with drawdown over the past 30 days running at about 2.1 million b/d.
In plain terms = the high-frequency "stockpiles are critically low" headlines may have been overstating the shortage all along — there is considerably more oil on the water than the market assumed.
What is happening on the Red Sea route?
Red Sea exports — via the Bab el-Mandeb Strait, the Suez Canal, and the Sumed pipeline — fell by roughly 4.5 million b/d in August versus July.
The driver: Saudi Arabia rerouted some flows from the western port of Yanbu back to its eastern terminals to avoid Houthi attack risk.
This means → dark transits are rising through the Persian Gulf while visible exports shrink on the Red Sea route — both corridors are under pressure simultaneously, and overall visibility into global crude logistics is deteriorating.
Oil is at $95 — what comes next?
Brent crude has climbed to $95 per barrel; Goldman says the market is pricing in a prolonged "no-deal Middle East" scenario.
After a one-month pause, the U.S. and Iran have resumed reciprocal strikes — a military attack on Iran is still not off the table, raising the risk of damage to oil-and-gas infrastructure. At least six confirmed tanker attacks occurred near the Persian Gulf and Red Sea in the past 10 days.
Yet Goldman also notes that rising dark transits and Chinese crude-import price sensitivity are capping further upside in oil prices — provided no large-scale infrastructure destruction occurs.
What is the core uncertainty?
As the share of dark transits keeps climbing, the tracking error between high-frequency data and actual supply will widen further.
The central question is singular: has the market, pricing off visible data alone, already over-priced the supply shock?
Put simply = if dark-transit tankers are carrying more oil than assumed, the real shortage is smaller than the data suggest — and some portion of the current $95 price may reflect a false alarm. This is the key validation point for the next leg in oil prices.
市场有风险，内容仅供研究参考，不构成投资建议。