# Oil prices: Oil tumbles more than 10% as Iran declares Strait of Hormuz open

> US crude futures fell nearly 12% to $83.85 a barrel and Brent lost 9% to $90.38 on Friday after Iran's foreign minister declared the Strait of Hormuz completely open during the Israel-Lebanon ceasefire. Araghchi said vessels must follow a coordinated route set by Iranian authorities. Trump welcomed the move in a social media post.

- Date: 2026-04-17 · published 2026-04-17T12:00:00.000Z
- Category: geopolitics · region Middle East · magnitude high
- Page: https://feedsoft.ai/events/8808-oil-prices-oil-tumbles-more-than-10-as-iran-declares-strait-of-hormuz-open
- Commodities: [Soybeans](https://feedsoft.ai/c/SOY.md), [Corn](https://feedsoft.ai/c/CORN.md), [Crude Oil (WTI)](https://feedsoft.ai/c/WTI.md), [Crude Oil (Brent)](https://feedsoft.ai/c/BRENT.md), [ULSD / Diesel](https://feedsoft.ai/c/DIESEL.md)

## Why it matters

The reopening removes a major supply disruption, so crude prices drop sharply. Lower energy costs reduce diesel and freight expenses for feed producers and may ease fertilizer prices over time.

## Read by commodity

- SOY: bearish ▼
- WTI: bearish ▼
- CORN: bearish ▼
- BRENT: bearish ▼
- DIESEL: bearish ▼

## Linked price moves

| Commodity | Date | Window | Change % | z-score | Why linked |
| --- | --- | --- | --- | --- | --- |
| BRENT | 2026-04-20 | 5 | -16.1% | -3.2 | Iran declaring Hormuz open on April 17 drove Brent down about 9% in one session, the main driver of the 5-day drop through April 20 via restored supply flows. |
| BRENT | 2026-04-17 | 1 | -15.4% | -3.7 | Reports on the same-day Hormuz opening announcement detail the Brent fall to about $90 and the WTI slide, matching the move's timing and mechanism. |

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| SOY | 2026-08-04 | [CBOT grains, soybeans fall as oil drops on Iran hopes \| Stock Market News](https://feedsoft.ai/events/12807-cbot-grains-soybeans-fall-as-oil-drops-on-iran-hopes-stock-market-news.md) | -0.9% | +9.1% |
| SOY | 2026-04-01 | [Grain, Oilseed Prices Fall as Traders Look for End to Iran War - Bloomberg](https://feedsoft.ai/events/19762-grain-oilseed-prices-fall-as-traders-look-for-end-to-iran-war-bloomberg.md) | -0.8% | +1.0% |
| SOY | 2026-07-27 | [Soybeans and corn fall more than 2% as oil drops, wheat also down \| ZAWYA](https://feedsoft.ai/events/8284-soybeans-and-corn-fall-more-than-2-as-oil-drops-wheat-also-down-zawya.md) | -6.1% | -1.8% |
| SOY | 2026-06-16 | [Corn, Wheat And Soy All See Prices Drop On Prospect Of US-Iran Deal \| ESM Magazine](https://feedsoft.ai/events/18835-corn-wheat-and-soy-all-see-prices-drop-on-prospect-of-us-iran-deal-esm-magazine.md) | -0.2% | +7.4% |
| SOY | 2026-07-28 | [Corn Futures Slide as Oil Selloff Triggers Profit-Taking](https://feedsoft.ai/events/9377-corn-futures-slide-as-oil-selloff-triggers-profit-taking.md) | -3.3% | +0.6% |
| CORN | 2026-08-04 | [CBOT grains, soybeans fall as oil drops on Iran hopes \| Stock Market News](https://feedsoft.ai/events/12807-cbot-grains-soybeans-fall-as-oil-drops-on-iran-hopes-stock-market-news.md) | -1.3% | +10.1% |
| CORN | 2026-04-01 | [Grain, Oilseed Prices Fall as Traders Look for End to Iran War - Bloomberg](https://feedsoft.ai/events/19762-grain-oilseed-prices-fall-as-traders-look-for-end-to-iran-war-bloomberg.md) | -1.7% | +1.5% |
| CORN | 2026-07-27 | [Soybeans and corn fall more than 2% as oil drops, wheat also down \| ZAWYA](https://feedsoft.ai/events/8284-soybeans-and-corn-fall-more-than-2-as-oil-drops-wheat-also-down-zawya.md) | -4.8% | +0.5% |

## Sources

- cnbc.com: https://www.cnbc.com/2026/04/17/oil-prices-wti-brent-israel-lebanon-ceasefire-trump.html
- profarmer.com: https://www.profarmer.com/news/crude-oil-plunges-11-strait-hormuz-reopening-what-it-means-grain-markets-and-fertilizer

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.