Chicago Onion Monopoly: The 1955 Market Manipulation and Subsequent Legislation

The Onion Futures Act is a piece of legislation in the United States that prohibits the trading of onion futures contracts. In 1955, a pair of traders acquired a substantial amount of onions and futures contracts, ultimately gaining control over 98% of the onions in Chicago. To compel growers to buy their inventory, these traders threatened to inundate the market with onions.