As the question says. Goes for all products which don’t have a matching future contract in the market.
Hey - so let me answer in two parts. First by showing you this link and the below image, and secondly by giving a more detailed overview of the associated charges on this. The detailed example of overnight charges is a little dated (with the oil price) but should still provide clarity. https://www.ig.com/uk/commodities
Let me know if I have misinterpreted your question...
1) The formula for calculating the Overnight Basis Adjustment is as follows: Overnight Basis = (P3 – P2)/