Potato futures: how the EEX contract worked, and why it closed

The EEX European Processing Potato Future

The contract (product code FAPP) was cash-settled against the EEX European Processing Potato Index. EEX's specification gives a contract size of 25 metric tonnes, a quotation in euros per 100 kg, a minimum price change of EUR 0.10 per 100 kg, and delivery months in an April, June and November cycle. Nothing was delivered. At expiry the holder received or paid the difference between the final settlement price and the previous day's settlement price (EEX contract specification, page last updated July 2023).

In practice it let a processor or trader hedge, or take a view on, the price of uncontracted processing potatoes in north-west Europe, the market described on the Europe prices page.

Delisting, 2026

EEX's customer notice of 13 March 2026 states that the European Processing Potato Future (FAPP) was delisted on 5 June 2026. The last tradeable contract was June 2026, with its last trading day on 4 June 2026. Trading in contracts beyond June 2026 stopped from 16 March, and the EEX European Processing Potato Index was published for the last time on 4 June 2026.

The notice does not give a reason. The Potatopedia corpus records that the decision followed a sustained fall in trading activity. A successor contract has not been announced in the sources reviewed.

United States: from the 1936 Act to the 1976 default

Irish (white) potatoes were covered by the US Commodity Exchange Act when it was enacted in 1936, giving them a legal basis for regulated futures trading. Onions were not so lucky: after a 1955 manipulation scheme in Chicago, in which traders Sam Siegel and Vincent Kosuga accumulated an estimated 99.3 percent of the available supply and then drove the price from $2.75 a bag to 10 cents by March 1956, Congress banned onion futures outright in 1958, and the ban still stands. A 1964 Senate bill sponsored by Edmund Muskie of Maine proposed the same for potatoes. It did not become law.

The New York Mercantile Exchange built its potato contract around Maine potatoes, but by the 1970s Idaho, with processors such as J.R. Simplot supplying fast-food French fries, had taken the lead in the national crop. In what became known as the Maine Potato War of 1976, contracts for an unprecedented 50 million pounds of Maine potatoes defaulted on 7 May 1976, the largest potato-futures default in NYMEX history to that point. NYMEX set an arbitrary settlement price of $10.60 to resolve the contracts. Confidence in the Maine contract collapsed and NYMEX delisted it (account from NPR Planet Money, TIME and CFTC history as compiled in the Potatopedia corpus).

India: MCX, 2014

India's MCX exchange discontinued its potato futures in 2014. The reasons recorded are insufficient liquidity and broad participation, inadequate physically stored stock behind the contracts, and investor activity in potato-linked instruments rather than in the physical commodity.

Why potatoes are hard to trade

Potatoes are bulky, semi-perishable and graded by variety and quality, which makes a standard, deliverable contract hard to define. Most processing volume is also contracted before planting, so processors have little need to hedge. The same pattern recurs across markets: the 1964 Senate bill, the 1976 default, India's 2014 closure and the 2026 EEX delisting each ended or weakened a contract for different immediate reasons, with the same structural backdrop.

A more useful price signal for many readers is the contract price and the free-buy quotation, covered on the Europe page, or the USDA fresh and processing prices on the USA page.

Sources

• EEX, Customer information: Delisting of EEX European Processing Potato Future (13 March 2026)
• EEX, European Processing Potato Future contract specification — specification mirrored from EEX; last updated July 2023
• NPR Planet Money, The Maine Potato War of 1976
• CFTC, official history; TIME archive, Commodities: The Great Potato Bust

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