MORROWFLY
Guided scenario

What if a US port strike shuts the East and Gulf Coast ports?

The 36 ILA ports handle about 55% of US container imports by volume. Three days was absorbed in 2024; 2002's 10-day lockout took months to clear. Model a longer one.

1The setup

The 36 ILA ports on the East and Gulf Coast, Maine to Texas, handled about 55% of US container imports by volume in the 12 months to Sep 2024 — per Vizion Tradeview container-booking data, a platform estimate rather than port-authority TEU figures. The closest measured analog is the ILA strike of Oct 1–3, 2024: 45,000 workers out for 3 days, ≥54 container ships queued, and a final settlement of ~62% wages over six years. For the long tail, 2002's 10–11-day West Coast lockout took months to clear and knocked affected firms' stock prices about 8%. Three days was absorbed; 10–11 days caused multi-month backlogs — so the grading line is 7 continuous days of halted operations.

2Right now

containers

INCOMPLETE

Coverage incomplete — the monitor is missing feeds for containers, so no score is shown. Incomplete coverage is not zero risk.

Monitor data as of Sep 24, 2026. Scores are observed readings, not forecasts.

How the shock travels

Container pile-up

≥54 container ships queued outside ports within 3 days in Oct 2024 (Everstream Analytics); each strike week removes 443,000–775,000 TEU of effective capacity, tightening global vessel supply if prolonged.

Evidence: Everstream Analytics ship counts + Sea-Intelligence capacity estimates, Oct 2024

Backlog clearing

Clearing takes 3–5× the strike length: Xeneta estimated 2–3 weeks to normalize after the 3-day 2024 strike, while the 10-day 2002 West Coast lockout took months to clear.

Evidence: Xeneta estimates via Reuters (2024) + NRF/Logistics Management on the 2002 lockout

Retail to consumer

Retail is roughly half of all container shipping volume — Walmart, IKEA and Home Depot are heavy East/Gulf users — so disruptions ahead of holiday season risk shortages from bananas to auto parts and spot freight surges.

Evidence: Reuters via gCaptain, Oct 2024 — retail ≈ half of container volume

West Coast diversion overload

Shippers diverted cargo to the West Coast pre-strike in 2024, and Everstream warned West Coast capacity would be “quickly inundated,” causing longer vessel waits and rail delays — the safety valve has limited headroom.

Evidence: Everstream via Inside Logistics, Oct 2024

Caveat: Unmeasured as a 2024 outcome — the strike ended in 3 days before diversion overload materialized

Wage-floor settlement

The 2024 deal raised ILA wages ~62% over six years with automation limits — a new structural labor-cost floor at East/Gulf ports.

Evidence: FreightAmigo/USMX, Jan 2025 — 62% wages + automation limits; settlement terms confirmed

Caveat: Cost pass-through to freight rates not measured — settlement terms confirmed, price effect unverified

3The exposure

Coverage incomplete — the monitor does not track exporter shares for container shipping. The exposure for this scenario is sized from the declared capacity snapshot in the “Adjust the assumptions” section below instead.

Shipping lane

What passes through US East & Gulf Coast ports (36 ILA ports)

lane throughput · not a goods flow

A port strike is a gateway-concentration shock: the exposure is the ports' share of US container volume, not a bilateral trade flow. Exposure here is throughput concentration — how much shipping uses the lane — not who imports from whom.

  • ~55%

    Scenario baseline (ILA/USMX statements), 2024

    Share of US container imports by volume handled at the 36 ILA ports

    US container imports by volume — East & Gulf Coast ports under the ILA master contract.

  • 8.70M TEU

    Port Authority of NY & NJ, 2024 At a Glance, 2024

    Port of New York & New Jersey throughput

    annual port throughput, 2024 — Busiest East Coast cargo gateway; 3rd-busiest US year on record. source

  • 5.55M TEU

    Port Authority of NY & NJ, 2024 At a Glance (US port rankings), 2024

    Port of Savannah throughput

    annual port throughput, 2024

  • 4.46M TEU

    Port Authority of NY & NJ, 2024 At a Glance (US port rankings), 2024

    Port Houston throughput

    annual port throughput, 2024

  • 3.50M TEU

    Port Authority of NY & NJ, 2024 At a Glance (US port rankings), 2024

    Port of Virginia throughput

    annual port throughput, 2024

  • ~50%

    Reuters via gCaptain, 2024

    Share of all container volume moved by retail shippers

    container shipping volume, context — Walmart, IKEA, Home Depot are heavy East/Gulf users — context, not exposure.

Combined East/Gulf TEU share of all-US port throughput: unknown — No single sourced aggregate; port-level TEU shown instead.

How we map this

Container shipping is a service, not a goods flow: there is no honest HS-code bilateral to attach to a strait. So this card measures the lane itself — transit shares, port TEU, gateway concentration — each figure sourced with its vintage. What a disruption does to prices or shortages is not modeled here.

4Adjust the assumptions

100%

Historical check: No container shipping episode on record — no historical range to compare this setting against.

What share of the exposed capacity is disrupted.

Resolution: Share of container operations halted at the 36 ILA ports (ILA/USMX statements)

Share of all US imports by volume in the hazard zone

US container imports by volume through ILA-affected ports — 55.0% of all US imports by volume

Exposed under your assumptions: 55.0% (55.0% × 10000% severity) — verified route share factored in; see “What this assumes”.

The hatched area is modeled from your assumptions, not a measured outcome.

Source: Vizion Tradeview container-booking data, 12 months to Sep 2024 — platform estimate, not port-authority TEU data

Exposed ≠ lost — affected trade can reroute, draw stocks, or substitute. This sizes the exposure, not the damage.

14d

Historical check: No container shipping episode on record — no historical range to compare this setting against.

Resolution: Days container operations are halted at the 36 ILA East/Gulf Coast ports

60d

Your assumption — not a measured buffer.

Resolution: Assumed days of stockpile cover — an assumption, not a measured buffer

Disruption timeline
090180270365 days
Disruption: 14 days
Assumed cover: 60 days — your assumptionYour assumption

Covered by stockpiles— the assumed cover outlasts the disruption

What this would have meant

At these settings, about 55.0% of the world's container shipping exports would be exposed to the disruption, and the 60-day assumed stockpile cover outlasts the 14-day disruption.

No close historical match in our records — this scenario is outside our recorded experience.

What this assumes
  • Exposure: Target share 55.0% × severity 100% = 55.0% exposed.
  • Uncovered days: max(0, 14 − 60) = 0.
  • Exposed ≠ lost: affected trade can reroute, draw down stocks, or find substitutes — this number sizes the exposure, not the damage.
  • Exporter share ≠ spare capacity: rivals may not be able to surge supply to fill the gap.
  • Stockpile cover of 60 days is your assumption, not a measured buffer.
  • Results are physical-exposure arithmetic from your stated assumptions — not a price forecast.

Analog check

No close historical match in our records — this scenario is outside our recorded experience.

Want the full controls? Reopen container shipping on its commodity page.

5What happened before

For perspective, not prediction

What to watch

  • ILA/USMX joint statements: the grading line is ≥7 continuous days of halted container operations (2024: 3 days absorbed; 2002: 10–11 days, multi-month backlog)
  • Queued vessels outside East/Gulf ports — ≥54 in 3 days in Oct 2024 (Everstream Analytics)
  • Sea-Intelligence's weekly TEU capacity-loss estimates (443k–775k TEU/week in 2024)
  • West Coast port and rail congestion — the diversion safety valve has limited headroom (unmeasured in 2024)
  • Retail inventory coverage ahead of holiday season — retail is ~half of container volume

Curated by Morrowfly — these are things to check, not monitor conditions.

Make it yours

Your call, in your words — recorded privately on this device, with a check-back in 30, 60, or 90 days.

Tell us

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Read by a human · never auto-published

Illustrative scenario. Not a prediction. Not financial advice.

Monitor data as of Sep 24, 2026 · Trade vintage 2024 · Scoring v3.2

What if a US port strike shuts the East and Gulf Coast ports? | Morrowfly