But it is not talking and agreeing. It is algorithm that determines some abstract price that makes sense in the current market. If me and my neighbor use the same formula from Wikipedia, is this also collusion?
> What if there are multiple vendors selling algorithms?
Then each vendor’s customers may constitute a small price fixing conspiracy, which is still illegal (price fixing doesn’t have a market threshold before it is illegal) but also a lot less effective, so it probably would be a transitory condition even if it didn’t get punished.
