RE:Here's how it worksThis is how it should work. However, in reality, it did not work like this. Yes, Zn prices fluctuated in 2018 between 1.6056 & 1.1037. However, they were above 1.1593 (price achieved by Trevali) in 10 of the months. Only in Aug & Sep were prices lower than 1.1593. Are you trying to say that most of the zn shipped by Trevali was received by Glencore in these two months only? That is possible only if Glencore did not take deliveries/possession of Zn from Jan 2018 to Jul 2018, took all deliveries, for Zn shipped by Trevali from Jan 2018 to Sep 2018, in the months of Aug 2018 & Sep 2018 and prices of Zn shipped by Trevali from Oct 2018 to Dec 2018 were not settled by year end.