Why you can’t trade onions futures is also a fun read, for similar reasons (“The Great Onion Corner”).
https://www.npr.org/2015/10/22/450769853/the-great-onion-cor...
Here's a direct link to the testimony mentioned in the Wall Street Journal:
https://www.cftc.gov/PressRoom/SpeechesTestimony/opagensler-...
gibbitz•1h ago