> there is no giant warehouse at the commodity exchange that stores the commodities Actually for many commodities there is: https://www.cmegroup.com/trading/me

> there is no giant warehouse at the commodity exchange that stores the commodities Actually for many commodities there is: https://www.cmegroup.com/trading/metals/base/base-metals-warehousing.html https://www.cmegroup.com/trading/metals/base/base-metals-war... But of course not for electricity.