I have never personally traded them pre-packaged like that ( I always legged into options on futures spread combinations or options on financial swaps / physical swaps spreads ) - but I have heard of them being offered by various exchanges.The other day I learned that ICE offers options on KC spreads - meaning the underlying is the spread itself (2 different ones). Nothing mind blowing about that but it does seem like a funny derivative rabbit hole to me - its like a derivative on a derivative of which you can then take to another level with option spreads.
Anyway, does CME offer similar products?
Any useful information from someone more adroit on the topic would be welcome !