From Wikipedia: “The Financial Times Stock Exchange 100 Index, also called the FTSE 100 Index, FTSE 100, FTSE, or, informally, the “Footsie” /ˈfʊtsi/, is a share index of the 100 companies listed on the London Stock Exchange with the highest market capitalization.”
I had the same thought but followed it with an “I should google that before I whine.” Turns out it’s a term I’m familiar with just via voice on the radio.
