Ever Given blocks the Suez Canal (March 2021)

The disruption was pure timing: flows delayed, not destroyed. Energy-supply timing (about 5.5M bbl/day of crude normally transits Suez), tanker freight rates and container supply-chain delays were the channels. For agriculture, contemporary coverage focused on delayed vessels, not price spikes — Reuters' ag-adjacent reporting centered on tanker rates and supply-chain scrambling 'for everything from grains to baby clothes' (March 26, 2021). No contemporary source ties any CBOT grain move to the blockage. Grain prices did move hard in March–April 2021 — but on separate fundamentals: US planting intentions and Chinese demand. No verified agricultural-price attribution was found: monthly windows cannot attribute a six-day blockage. The fear was a duration fear ('if the delays extend… weeks'), and the duration didn't materialize. The market priced it correctly as a timing shock.

Allianz: the blockage 'could cost global trade between $6 and $10 billion a week' and was 'the straw that breaks global trade's back' (via TheStreet, March 26, 2021). 'Companies may have to re-route cargoes around Africa if the blockage extends beyond 24 hours' — Chris Evans, Colliers (Reuters, March 24, 2021). Oil: WTI jumped $2.62 to $61.17 after a failed refloat attempt (TheStreet, March 26, 2021), and 'shipping rates for oil product tankers nearly doubled' (Reuters, March 26, 2021).

• crude oil (not tracked at the time of this analysis)

  Mar 26 → Mar 30, 2021 · External: contemporary oil reporting

  Benchmark: Contemporary WTI reporting (Mar 26–30, 2021); oil was not a tracked series when this record was written and no pct was computed

  —

  WTI +$2.62 to $61.17 on the failed refloat attempt (TheStreet, Mar 26); −1.6% to $60.52 on reopening (OilPrice, Mar 30). The one verified price reaction — fully reversed in a day.

We could not find any contemporary reporting tying CBOT grain moves to the March 23–29 blockage — absence of evidence, stated plainly rather than filled. Oil figures are contemporary reporting, not our series (oil is not tracked). The March–April 2021 grain moves below reflect unrelated fundamentals (planting intentions, Chinese demand), which is precisely the point: other drivers dominated.

A timing shock the market priced as a timing shock. Six days of delayed flows moved oil about $2.60 and doubled tanker rates briefly, then everything reversed. The honest lesson: a dramatic physical disruption with no destroyed supply and a short duration need not touch commodity prices at all — and when prices do move in the window, check whether the event had anything to do with it.