Market events

First US BSE (mad cow) case & export bans (2003-04)

2003–2004: a documented market event that overlapped the wholesale price windows of 5 tracked ingredients — co-occurrence in time, never an asserted cause.

What happened

On December 23, 2003, USDA announced the first US case of bovine spongiform encephalopathy (BSE, 'mad cow disease'), confirmed in a dairy cow slaughtered in Washington State (Mabton). Following the announcement, USDA/APHIS documented that dozens of countries closed their borders to US beef, with major export markets including Japan and South Korea banning US beef; some restrictions lasted years. On December 30, 2003, USDA barred nonambulatory ('downer') cattle and specified risk materials (e.g., brain and spinal cord tissue from older cattle) from the human food supply.

Documented account from our open, cited registry (sources below). Shown as context beside the price record — co-occurrence in time, never an asserted cause.

Affected ingredients

Why these ingredients were exposed

Each affected ingredient's public supply structure — where it comes from and how much it leans on imports. Context that makes the co-occurrence with a documented event legible, never its cause.

  • RibeyeDomestically sourced comes almost entirely from domestic production, with little import buffer (reliance ~5% by value). Its exposure runs through domestic production structure, not import origins — a domestic event overlaps its price window.
  • StriploinDomestically sourced comes almost entirely from domestic production, with little import buffer (reliance ~5% by value). Its exposure runs through domestic production structure, not import origins — a domestic event overlaps its price window.
  • Short ribDomestically sourced comes almost entirely from domestic production, with little import buffer. Its exposure runs through domestic production structure, not import origins — a domestic event overlaps its price window.
  • Beef tenderloinDomestically sourced comes almost entirely from domestic production, with little import buffer (reliance ~5% by value). Its exposure runs through domestic production structure, not import origins — a domestic event overlaps its price window.
  • Ground beefDomestically sourced comes almost entirely from domestic production, with little import buffer (reliance ~5% by value). Its exposure runs through domestic production structure, not import origins — a domestic event overlaps its price window.

Reliance is a share of import value, a rough exposure proxy, not a supply-security score. It explains why an ingredient sits in the path of a documented event — not that the event caused any price move. Co-occurrence in time, never a cause.

The detected moves that overlapped

Each figure is a wholesale reference against its own ±26-week normal — a market move, never a delivered price.

  1. Beef tenderloin — Nov 2003: the wholesale reference ran +54% above its ±26-week normal, held 91 days.

    Co-occurrence in time, not a cause.

  2. Ribeye — May 2004: the wholesale reference ran +36% above its ±26-week normal, held 56 days.

    Co-occurrence in time, not a cause.

  3. Striploin — May 2004: the wholesale reference ran +56% above its ±26-week normal, held 119 days.

    Co-occurrence in time, not a cause.

What moved together

Co-occurrence, not cause

Ribeye

In Ribeye's 6 notable moves, these ingredients ran the same direction in the same weeks:

  1. Garlic2 of 6 moves
  2. Napa cabbage2 of 6 moves
  3. Pork loin2 of 6 moves
  4. Striploin2 of 6 moves
  5. Acorn squash1 of 6 moves

Striploin

In Striploin's 6 notable moves, these ingredients ran the same direction in the same weeks:

  1. Ground Pork2 of 6 moves
  2. Pork loin2 of 6 moves
  3. Pork shoulder2 of 6 moves
  4. Ribeye2 of 6 moves
  5. Acorn squash1 of 6 moves

Short rib

In Short rib's 6 notable moves, these ingredients ran the same direction in the same weeks:

  1. Onions3 of 6 moves
  2. Beef tenderloin2 of 6 moves
  3. Apples1 of 6 moves
  4. Broccoli1 of 6 moves
  5. Butter lettuce1 of 6 moves

Beef tenderloin

In Beef tenderloin's 6 notable moves, these ingredients ran the same direction in the same weeks:

  1. Artichoke2 of 6 moves
  2. Short rib2 of 6 moves
  3. Butter1 of 6 moves
  4. Cauliflower1 of 6 moves
  5. Cheddar cheese1 of 6 moves

Moving in the same weeks is not one thing causing another — many of these share a growing region, a shipping lane, or an aisle. It is a directed, bounded count: in K of an ingredient's own notable moves, another ran the same way.

Sources

5 sources
Check your own invoice against this reference All market events

Documented events come from our open, cited registry (CC‑BY). Price moves are detected from public history (USDA/BLS/FRED) and shown as co-occurring context, never asserted as the cause. How events are picked.