Sun 09 Aug 2026 · 14:17 UTCNot investment advice. Automated, AI and OSINT based. May contain errors.
← Chokepoints
Bosphorus
HighTransit data to 31 Jul · IMF PortWatch derived, lags a few days
Transits
69% of baseline
61 a day against a 12-month average of 89
Week on week
▼ 11%
Trend
7-day average 61 transits/day, down 31% vs the trailing 12-month average. Source: IMF PortWatch, data to 2026-07-31.
The market lens
The only sea route out of the Black Sea, carrying Russian and Kazakh crude and products plus Ukrainian grain. Turkey administers passage under the Montreux Convention, which also governs warship access. Friction here shows up as tanker queues, insurance arguments, and grain-corridor risk premia.
What to watch
Tanker queue lengths and Turkish insurance-documentation requirements.
The state of the Black Sea grain corridor and strikes on Ukrainian ports upstream.
Montreux-related decisions on warship passage during escalation.
Recent signals touching Bosphorus
No recent signals name this chokepoint. Quiet is information too.