Strait of Hormuz traffic returns to normal by December 31?
Traffic in the Strait of Hormuz is unlikely to return to normal (defined as a 7-day moving average of 60+ transit calls) by December 31, 2026, due to Iran's effective closure since February 2026, ongoing attacks on commercial vessels, and major carriers suspending transits, despite a brief US-Iran agreement in June that failed to sustain normal levels.
Analysis
As of July 18, 2026, the Strait of Hormuz remains effectively closed to commercial shipping for 139 consecutive days, with traffic at only 11% of typical levels. Iran officially declared the strait closed "until further notice" on July 11, 2026, following renewed attacks on tankers and cargo vessels. Only 10–14 vessels transited on July 12–13, compared to a normal daily average of approximately 60 vessels. Major global carriers including Maersk, MSC, and Hapag-Lloyd have suspended all transits and rerouted via the Cape of Good Hope, imposing emergency surcharges due to severe security threats.
A US-Iran memorandum of understanding finalized on June 17, 2026, initially guaranteed immediate commencement of commercial navigation, with 25 commercial vessels traversing the strait on June 25—the highest volume since April. However, this reopening was temporary and conditional, lasting only about two weeks during a ceasefire. The agreement broke down on July 8 after Iran struck multiple commercial ships, leading to the current closure. The threat level has been raised to "severe," with crisis pressure at 92 (extreme) and an Escalation Forecast of 67 (high), indicating continued volatility that undermines carrier confidence.
Even if a preliminary agreement is signed in the coming days, carriers will remain cautious until safe passage is durably confirmed. Historical patterns show that gradual recovery takes months, not weeks, and hundreds of vessels remain stranded. The UK Maritime Trade Operations Center reported no meaningful increase in traffic since the cease-fire deal, with only four vessels passing through in the past 24 hours versus 138 per day pre-hostilities. Iran continues to require prior coordination with its military forces for all transits, adding bureaucratic and security hurdles. With no durable security agreement in place and high escalation risks, full normalization to 60+ daily transits by December 31 appears highly improbable.
Arguments
For
- The June 17 US-Iran MOU initially enabled 25 commercial vessels to transit, showing potential for rapid recovery if security improves
- Kpler data showed 40 vessels passing on a single Monday in mid-July, indicating some traffic resilience despite strikes
- US Navy announced a widened route near Oman on June 27, challenging Iran's control and potentially enabling increased naval and commercial traffic
- Oil prices have held steady around $76.58/barrel, suggesting markets may not expect prolonged closure if a durable agreement emerges
Against
- Iran has only allowed temporary, conditional passage for ~2 weeks during a ceasefire, not a permanent reopening
- 81 tankers have gone dark on AIS in the last 24 hours versus a typical 28.5, indicating severe carrier avoidance
- UKMTO reported only 4 vessels passed in the past 24 hours versus 138 per day pre-hostilities, with no meaningful increase since the cease-fire
- Hundreds of vessels remain stranded, and restarting global shipping requires confidence in security improvements that is currently absent
Key drivers
- Iran's official closure declaration on July 11, 2026, "until further notice"
- Major global carriers suspending all transits and rerouting via Cape of Good Hope
- Threat level at "severe" with crisis pressure of 92 (extreme) and Escalation Forecast of 67 (high)
- Only 11% of normal traffic volume as of July 2026, with 10–14 vessels transiting daily
Risk factors
- A durable US-Iran security agreement could unexpectedly restore traffic if carriers regain confidence
- IMF Portwatch data revisions or reporting gaps might artificially inflate the 7-day moving average
- Temporary ceasefire extensions could allow conditional passage that briefly meets the threshold
- Alternative shipping routes (Southern Highway) might see increased dark AIS traffic not captured by IMF Portwatch
Scenarios
Best case
A durable US-Iran security agreement is signed within weeks, Iran lifts its closure declaration, and major carriers resume transits by August, allowing traffic to gradually climb to 60+ daily transits by November 2026.
Most likely
Traffic remains at 11–15% of normal levels through Q3 2026, with only sporadic conditional passage during temporary ceasefires. A gradual, partial recovery begins in Q4 if a ceasefire proves durable, but full normalization to 60+ daily transits does not occur before December 31.
Worst case
Iran maintains the closure "until further notice" through December, attacks on commercial vessels continue, and carriers permanently reroute via the Cape of Good Hope, leaving traffic at 10–15% of normal levels with no recovery.
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